Q- Calculate the velocity of the light ray in the medium, if the critical angle for TIR from medium to the vacuum is 30°.
(a) 2 x 108 m/s
(b) 1.5 x 108 m/s
(c) 0.75 x 108 m/s
(d) 3 x 108 m/s
Answer::: (b) 1.5 x 108 m/s
Q- Which of the following is the combination that is used in the formation of achromatic lenses?
(a) 1 convex and 1 plane mirror
(b) 2 convex lenses
(c) 1 convex and 1 concave lens
(d) 2 concave lenses
Answer:: (c) 1 convex and 1 concave lens
Q- How does magnifying power change for an objective lens if the focal length of the objective lens is increased?
(a) The microscope will decrease but for the telescope, it will increase
(b) The microscope will increase but for the telescope, it decreases
(c) The microscope and telescope will increase
(d) The microscope and telescope will decrease
Answer:: (a) The microscope will decrease but for the telescope, it will increase
Q- What is the magnification produced by the plane mirror?
(a) Zero
(b) +1
(c) -1
(d) Between 0 and +∞
Answer:: (b) +1
Q- What happens to the refractive index on heating the liquid?(a) Increases
(b) Decreases
(c) Remains unchanged
(d) Increases or decreases depending on the rate of heating
Answer:: (b) Decreases
Q- Calculate the speed of light in water if the refractive index of water is 1.33(a) 4 x 108 m/s
(b) 2.25 x 108 m/s
(c) 1.33 x 108 m/s
(d) 3 x 108 m/s
Answer:: (b) 2.25 x 108 m/s
Q- What is hypermetropia?
(a) Bad vision due to age
(b) Short-sightedness
(c) Long-sightedness
(d) Formation of a layer on the eye
Answer:: (c) Long-sightedness
Q- Rainbow is an example of which phenomenon?
(a) Refraction and scattering
(b) Refraction and total internal reflection
(c) Dispersion and reflection
(d) Dispersion and total internal reflection
Answer:: (d) Dispersion and total internal reflection
Q- What does the internal resistance of a cell mean?
(a) The resistance of the material used in the cell
(b) The vessel of the cell
(c) The electrodes of the cell
(d) The electrolyte used in the cell
Answer:: (d) The electrolyte used in the cell
Q- A potentiometer is considered a versatile and accurate device to make an electrical measurement of EMF. Why?
(a) Because the method involves a combination
(b) There are cells involved
(c) Because of potential gradients
(d) As there is no flow of current through the galvanometer
Answer:: (d) As there is no flow of current through the galvanometer
Q- Consider copper and aluminium wire whose length and resistance are the same. Also, the specific resistance of aluminium is more than copper. Select the correct statement
(a) Copper and aluminium mass are the same
(b) Copper wire has more mass than the aluminium wire
(c) Copper wire has less mass than the aluminium wire
(d) The information given is incomplete
Answer:: (d) The information given is incomplete
Q- Following is the graph which represents the thermo EMF of two different metals which are joined end to end. One end of the metal is kept at a constant temperature while the other end is heated at very high temperature.
Answer:: (d)
Q- Select the graph which depicts the variation in thermoelectric power and the temperature difference between the hot and cold junction in the thermocouples
Answer:: (a)
Q- Which of the following represents the relationship between the current flowing, i through the electric heater and the time taken, It.
Answer:: (b)
Q- Consider three voltmeters A, B, and C with resistance R, 1.5R, and 3R respectively. Potential difference is applied across the points X and Y, the voltmeter readings are VA, VB, and VC.
(a) VA = VB ≠ VC
(b) VA ≠ VB ≠ VC
(c) VA = VB = VC
(d) VA ≠ VB = VC
Answer:: (c) VA = VB = VC
Q- What is the ratio of power dissipated if two electric bulbs are connected in series and the ratio of their resistance is 1:2?
(a) 1:4
(b) 1:2
(c) 2:1
(d) 1: 1
Answer:: (b) 1:2
Q- What is the principle behind thermocouple
(a) Joule effect
(b) Thomson effect
(c) Seebeck effect
(d) Peltier effect
Answer:: (c) Seebeck effect
Q- According to Faraday’s laws of electrolysis, to which of the following is the amount of decomposition proportional to?
(a) The electrochemical equivalent of the substance
Answer:: (a) The electrochemical equivalent of the substance
Q- Lenz law is based on which of the following conservation>
(a) Charge
(b) Mass
(c) Momentum
(d) Energy
Answer:: (d) Energy
Q- What will be the acceleration of the falling bar magnet which passes through the ring such that the ring is held horizontally and the bar magnet is dropped along the axis of the ring?
(a) It depends on the diameter of the ring and the length of the magnet
(b) It is equal due to gravity
(c) It is less than due to gravity
(d) It is more than due to gravity
Answer:: (c) It is less than due to gravity
Q- An observer is seeing the setup of an aluminium ring B facing an electromagnet A. The current I through A can be altered if
(a) B is independent of an increase or decrease of I
(b) If I increases, A will attract B
(c) If I increase, A will repel B
(d) If I decrease, A will repel B
Answer:: (c) If I increase, A will repel B
Q- What is the equivalent inductance of the following circuit if the pure inductance is 3.0H
(a) 9H
(b) 3H
(c) 1H
(d) 2H
Answer:: (c) 1H
Q- What is the need for laminating the core of a transformer?
(a) To reduce the resistance in the winding
(b) To reduce the eddy currents
(c) To reduce the hysteresis
(d) None of the above
Answer:: (b) To reduce the eddy currents
Q- Which of the following represent the variation of induced EMF with respect to time t if a short bar magnet is moved along its axis and has a constant velocity.
Answer:: (b)
Q- A wire loop is rotated in a magnetic field such that the frequency of change of direction of the induced emf is
(a) Six times per revolution
(b) Four times per revolution
(c) Twice per revolution
(d) Once per revolution
Answer:: (c) Twice per revolution
Q- Which of the following is the equivalent quantity of mass in electricity?
(a) Current
(b) Charge
(c) Potential
(d) Inductance
Answer:: (d) Inductance
Q- What is the unit of inductance?
(a) Volt/ampere
(b) Joule/ampere
(c) Volt-ampere/sec
(d) Volt-sec/ampere
Answer:: (d) Volt-sec/ampere
Q- What is the angle made by the plane of eddy currents with the plane of magnetic lines of force?
(a) 0°
(b) 40°
(c) 90°
(d) 180°
Answer:: (c) 90°
Q- Which of the following graph depicts the variation in the potential energy for a particle executing SHM at the origin x = 0?
Answer:: (d)
Q- Which of the following graph represents the variation in the potential energy as a function of time t and displacement x if the displacement of the particle is x = A cos⍵t
(a)I,IV
(b) II, III
(c) I,III
(d) II,IV
Answer:: (c) I,III
Q- Calculate the amplitude for a SHM using the equation x = 3sin2pt + 4cos3pt
(a) 3
(b) 5
(c) 4
(d) 7
Answer:: (b) 5
Q- What is the constant of propotionality of an oscillator if the damping force is directly propotional to the velocity
(a) kg.s-1
(b) kg.m.s-1
(c) kg.s
(d) kg.m.s-2
Answer:: (a) kg.s-1
Q- What is the phase difference between the prongs of the tuning fork
(a) 5π
(b) π
(c) 2π
(d) 3π
Answer:: (b) π
Q- What is the change in the phase if a wave is reflected from a denser medium
(a) 3π
(b) 0
(c) π
(d) 2π
Answer:: (c) π
Q- The observer hears a sound from the source which is moving away from the observer who is stationary. Determine the frequency of the sound
(a) It is halved
(b) It remains the same
(c) It reaches infinity
(d) It gets doubled
Answer:: (a) It is halved
Q- The length of the pendulum which is displaying SHM is increased by 21%. Calculate the percentage increase in the periodic time of the pendulum.
(a) 21%
(b) 10%
(c) 11%
(d) 42%
Answer:: (b) 10%
Q- Which of the following does not exhibit polarization
(a) Longitudinal wave in a gas
(b) Transverse wave in a gas
(c) Neither (a) nor (b)
(d) Both (a) and (b)
Answer:: (a) Longitudinal wave in a gas
Q- Name the law that states the force between electric charges
(a) Ohm’s law
(b) Coulomb’s law
(c) Faraday’s law
(d) Ampere’s law
Answer:: (b) Coulomb’s law
Q- What happens to the force acting between the charged particles, if the distance between these charged particles is halved?
(a) It increases by four times
(b) It gets doubled
(c) It becomes half
(d) It reduces by one-fourth
Answer:: (a) It increases by four times
Q- What is the electric potential of the points A, B, and C which are in a uniform electric field?
(a) The electric field is the same at all three points A, B, and C
(b) Maximum at A
(c) Maximum at B
(d) Maximum at C
Answer:: (c) Maximum at B
Q- What is the minimum charge on a particle?
(a) 1 Coulomb
(b) 1.6 x 10-19 Coulomb
(c) 3.2 x 10-19 Coulomb
(d) 6.6 x 10-19 Coulomb
Answer:: (b) 1.6 x 10-19 Coulomb
Q- For a hollow spherical shell, potential, V changes with respect to distance, r from the centre. Which graph from the following represents this?
Answer:: (b)
Q- What is the graphical representation of an electric field due to the uniformly charged sphere of radius R which is a function of distance from the centre?
Answer:: (a)
Q- The capacity of parallel plate condenser is dependent on the
(a) The separation between the plates
(b) The metal used for the construction
(c) The thickness of the plate
(d) The potential applied across the plates
Answer:: (a) The separation between the plates
Q- What does an electric dipole experience when it is kept in the non-uniform electric field?
(a) Only a force
(b) Only torque
(c) Force and torque both
(d) Neither force nor torque
Answer:: (c) Force and torque both
Q- The capacitance of the capacitor is independent of
(a) The charges present on the plate
(b) The distance of separation between the plates
(c) The shape of the plates
(d) The size of the plates
Answer:: (d) The size of the plates
Q- Choose the correct statement
(a) A body can be accelerated by frictional force
(b) There can be zero friction
(c) Kinetic friction is greater than rolling friction
(d) Frictional force and area of contact between the two surfaces are proportional
Answer:: (c) Kinetic friction is greater than rolling friction
Q- Consider a car that overturns while taking a turn. Select the option that is experienced by the wheels of the car.
(a) First, both inner, as well as the outer wheel, leave the ground
(b) First, the inner wheel leaves the ground
(c) The inner wheel experiences no change
(d) None of the above
Answer:: (b) First, the inner wheel leaves the ground
Q- Let two bodies be with masses 2kg and 5kg respectively. Let these bodies be at rest with the same force acting on them. Calculate the ratio of times that is required by both the bodies to reach the final velocity.
(a) 2:5
(b) 25:4
(c) 5:3
(d) 4:25
Answer:: (a) 2:5
Q- Let A, B, and C be the three blocks of mass 2kg each. These blocks are hanging over a pulley with the help of a string. What is the tension produced by the string connecting B and C?
(a) 3.3N
(b) 0
(c) 13.1N
(d) 19.6N
Answer:: (c) 13.1N
Q- Consider three masses of 1kg, 3kg and 6kg which are connected to each other and are placed horizontally on the table. Calculate the acceleration of this system. Consider g = 10m/s.
(a) 3
(b) 0
(c) 1
(d) 2
Answer:: (d) 2
Q- From the following diagram, select the correct diagram when a vessel containing water is given a constant acceleration towards the right along the straight line.
Answer:: (c)
Q- Consider a man standing on the spring balance such that the reading on the spring balance is 60kg. If the man jumps out of the spring balance what will be the final reading of the spring balance?(a) Remains unchanged
(b) Increases
(c) Decreases
(d) First increases then decrease to zero
Answer:: (d) First increases then decreases to zero
Q- Which of the following should be constant for a body to have a constant momentum?
(a) Acceleration
(b) Force
(c) Velocity
(d) All of the above
Answer:: (d) All of the above
Q- Following is the diagram of the thermodynamic process. Refer the diagram and match the following
P Process – I (a) Adiabatic
Q Process – II (b) Isobaric
R Process – III (c) Isochoric
S Process – IV (d) Isothermal
(a) (P,c), (Q,d), (R,b), (S,a)
(b) (P,c), (Q,d), (R,b), (S,a)
(c) (P,a), (Q,c), (R,d), (S,b)
(d) (P,c), (Q,a), (R,d), (S,b)
Answer:: (d) (P,c), (Q,a), (R,d), (S,b)
Q- Which of the following process is used to do maximum work done on the ideal gas if the gas is compressed to half of its initial volume?
(a) Isothermal
(b) Isochoric
(c) Isobaric
(d) Adiabatic
Answer:: (d) Adiabatic
Q- The coefficient performance of a refrigerator is 5. If the temperature inside the freezer is -20℃, calculate the heat rejected to the surrounding
(a) 11℃
(b) 41℃
(c) 21℃
(d) 31℃
Answer:: (d) 31℃
Q- A thermodynamic system is explained with the help of the graph ABCD. What is the heat rejected by the system during the cycle?
(a) pV
(b) 2pV
(c) 4pV
(d) 1/2pV
Answer:: (b) 2PV
Q- Select the incorrect statement
(a) For the triple point of water, 1°K is equal to 1/273.16.
(b) The first law of thermodynamics is also known as the law of thermal equilibrium
(c) The triple point of water is one of the reference points on the thermodynamic scale of temperature
(d) At room temperature, the heat of combustion is not found
Answer:: (d) At room temperature, the heat of combustion is not found
Q- What is a necessary condition for a reaction to be spontaneous at all temperatures?
(a) ΔH < ΔG
(b) ΔG and ΔH should be positive
(c) ΔH = ΔG = 0
(d) ΔG and ΔH should be negative
Answer:: (d) ΔG and ΔH should be negative
Q- A gas is compressed to half of its initial volume isothermally. The same gas is compressed again until the volume reduces to half through an adiabatic process. Then
(a) Work done during isothermal compression is more
(b) Work done is independent of the processes used for compression
(c) Work done is more during the adiabatic process
(d) Work done is dependent on the atomicity of the gas
Answer:: (c) Work done is more during the adiabatic process
Q- Select the factor that affects the heat of reaction which is based on Kirchoff’s equation
(a) Molecularity
(b) Temperature
(c) Pressure
(d) Volume
Answer:: (b) Temperature
Q- For all the reactions what is the nature of the chemical dissociation?
(a) Exothermic
(b) Reversible
(c) Endothermic
(d) Reversible and endothermic
Answer:: (d) Reversible and endothermic
Q- Which of the following is the largest unit of energy
(a) Electron volt
(b) Joule
(c) Calorie
(d) Erg
Answer:: (c) Calorie
Q- How many numbers of base SI units are there?
(a) 5
(b) 10
(c) 7
(d) 9
Answer:: (c) 7
Q- What is the percentage error in the measurement of the kinetic energy of a body, if there is a positive error of 50% in the speed of the body
(a) 125%
(b) 30%
(c) 50%
(d) 100%
Answer:: (d) 100 %
Q- What is the dimensional formula of torque and energy
(a) [ML-3T-2] and [MLT-2]
(b) [ML2T-2] and [MLT-2]
(c) [ML2T-2] and [ML2T2]
(d) [MLT2] and [ML2T2]
Answer:: (c) [ML2T-2] and [ML2T2]
Q- Identify the physical parameters that are having the same dimensions from the below-given list:
(i) Magnetic field
(ii) Energy density
(iii) Refractive index
(iv) Young’s modulus
(v) Dielectric constant
(a) (ii) and (iv)
(b) (i) and (v)
(c) (iii) and (iv)
(d) (iv) and (iii)
Answer:: (a) (ii) and (iv)
Q- Which the following is a dimensionless quantity
(a) Refractive index
(b) Gravitational constant
(c) Velocity
(d) Planck’s constant
Answer:: (a) Refractive index
Q- Calculate the value of the dot product of the two vectors whose magnitudes are 3 units and 4 units and their resultant is 1 unit.
(a) +6 units
(b) 0
(c) -12 units
(d) -1 unit
Answer:: (c) -12 units
Q- Following are the readings obtained while measuring the diameter of a wire by using the screw gauge0 mm is the main scale reading
52 divisions are the circular scale reading
What is the diameter of the wire if 1 mm on the main scale is equal to the 100 divisions on the circular scale
(a) 0.016 cm
(b) 0.052 cm
(c) 0.15 cm
(d) 0.05 cm
Answer:: (b) 0.052 cm
Q- Below is the distance-time curve traced by the particle. What is the maximum instantaneous velocity of the particle around the point
(a) D
(b) B
(c) A
(d) C
Answer:: (d) C
Q- Which of the following statement is true if a body moves in a semicircular track whose radius is R
(a) 2R is the displacement of the body
(b) πR is the distance travelled by the body
(c) Both (a) and (b) are correct
(d) None of the above
Answer:: (c) Both (a) and (b) are correct
Q- What does the area under acceleration-time graph represent for any given time interval
(a) Final velocity
(b) Distance travelled
(c) Change in the velocity in that time interval
(d) Displacement of the particle
Answer:: (c) Change in the velocity in that time interval
Q- When can we say that the resultant of the two vectors is maximum
(a) When the vectors are acting in the opposite direction
(b) Both the vectors are acting in the same direction
(c) When the vectors are at right angles
(d) When the vectors are parallel to each other
Answer:: (b) Both the vectors are acting in the same direction
Q- What happens to the gravitational potential at the centre of the uniform spherical shell which shrinks gradually?
(a) Remains constant
(b) Decreases
(c) Increases
(d) Oscillates
Answer:: (b) Decreases
Q- Choose the factor on which the orbital velocity does not depend when the satellite is orbiting close to the earth’s surface
(a) The mass of the earth
(b) The mass of the satellite
(c) The orbital radius
(d) The radius of the earth
Answer:: (b) The mass of the satellite
Q- The atmosphere around the earth is held by
(a) Gravity
(b) Winds
(c) Clouds
(d) None of the above
Answer:: (a) Gravity
Q- By how much does kinetic energy increase if the momentum is increased by 20%
(a) 55%
(b) 66%
(c) 44%
(d) 77%
Answer:: (c) 44%
Q- Calculate the energy loss in a perfectly inelastic collision if the mass of the object is 40kg with velocity 4m/s hits the object of mass 60kg with velocity 2m/s.
(a) 440J
(b) 110J
(c) 392J
(d) 48J
Answer:: (d) 48J
Q- Calculate the final kinetic energy of a block of mass if the mass of the block is 10kg and has a constant velocity of 10m/s. The block of mass is subjected to a retarding force of F=0.1J/m
(a) 275J
(b) 250J
(c) 475J
(d) 450J
Answer:: (c) 475J
Q- What is the average power required to lift a mass of 100kg to a height of 50m in 50 seconds?
(a) 980
(b) 100
(c) 50
(d) 5000
Answer:: (a) 980
Q- What is the power of the engine when the velocity of the car is v, mass m, acceleration a, and external resistance R
(a) (R-ma)v
(b) (R+ma)v
(c) mav
(d)Rv
Answer:: (b) (R+ma)v
Q- When can one say that work is done on the body
(a) When the body experiences force
(b) When there is an increase in energy because of mechanical influence
(c) When the body moves a certain distance
(d) None of the above
Answer:: (b) When there is an increase in energy because of mechanical influence
Q- Select the incorrect statement for the given situation: Two bodies with mass m1 and m2 undergo elastic collision
(a) When m1 and m2 is at rest, the kinetic energy transferred will be maximum
(b) The bodies will move in the same direction if m1 = m2 and when the collision is in oblique
(c) When m1 > m2, m2 will move with four times increase in its velocity than m1
(d) When m1 < m2, the transfer of momentum will be maximum
Answer:: (c) When m1 > m2, m2 will move with four times increase in its velocity than m1
Q- What is the ratio of velocities of a nucleus that splits into two parts with radii 1:2
(a) 6:1
(b) 2:1
(c) 8:1
(d) 4:1
Answer:: (c) 8:1
