Ohms law MCQ
Q1: If a current of 5 Amperes flows through the conductor. The number of electrons per second will is
a) 1.6 x 10-19
b) 3.12 x 1019
c) 4 x 1019
d) 7.68 x 1020
Answer: (b) 3.12 x 1019
Q2: Ohm’s law is true for
a) Metallic conductors at low temperature
b) Metallic conductors at high temperature
c) For electrolytes, when current passes through them
d) For diode when current flows
Answer: (a) Metallic conductors at low temperature
Q3: An example of non-ohmic resistance is
a) Diode
b) Tungsten wire
c) Carbon resistance
d) Copper wire
Answer: (a) Diode
Q4: In a conductor, if 6-coulomb charge flows for 2 seconds. The value of electric current will be
a) 3 ampere
b) 3 volts
c) 2 amperes
d) 2 volts
Answer: 3 amperes
Q5: An EMF source of 8.0 V is connected to a purely resistive electrical appliance. An electric current of 2.0 A flows through it. What is the resistance offered by the electrical appliances?
a) 4 ohm
b) 6 ohm
c) 2 ohm
d) 3 ohm
Answer: (a) 4 ohm
Q6: A potential difference of 10 V is applied across a conductor whose resistance is 2.5 ohm. What is the value of current flowing through it?
a) 4 amperes
b) 2 amperes
c) 6 amperes
d) 10 amperes
Answer: (a) 4 amperes
Q7: If the conductor resistance is 50 ohm and the current passing through it is 5 A. What is the value of potential difference?
a) 150 V
b) 250 V
c) 50 V
d) 15 V
Answer: (b) 250 V
Q8: When the length of the conductor is doubled and the area of cross-section remains the same then its resistance
a) Remains the same
b) Will be doubled
c) Will become half
d) Will increase by four times
Answer: (b) Will be doubled
Q9: The current passing through a resistor in a circuit is 1 A when the voltage across the same resistor is 10 V. What is the value of current when the voltage across the resistor is 8 V
a) 0.8 A
b) 8 A
c) 80 A
d) 18 A
Answer: (a) 0.8 A
Q10: Two resistors R1 and R2 with resistance 5 ohms and 10 ohms respectively are connected in series. The voltage across R1 is 4 V. What will be the value of current across R2.
a) 0.8 A
b) 8 A
c) 80 A
d) 18 A
Answer: (a) 0.8 A
