Most important MCQs of Electricity Chapter of class 10 science
1. The work done in moving a unit charge across two points in an electric circuit is a measure of
(a) current (b) potential difference (c) resistance (d) power
2. The device used for measuring potential difference is known as : (a) potentiometer (b) ammeter (c) galvanometer (d) voltmeter
3. The other name of potential difference is:
(a) wattage (b) ampereage (c) voltage (d) potential energy
4. Which of the following units could be used to measure electric charge ?
(a) ampere (b) joule (c) volt (d) coulomb
5. Which unit could be used to measure current?
(a) coulomb (b) ampere (c) volt (d) joule
6. The unit for measuring potential difference is :
(a) watt (b) ohm (c) volt (d) kWh
7. One coulomb charge is equivalent to the charge contained in :
(a) 2.6 x 10^19 electrons (b) 6.2 x 10^19 electrons (c) 2.65 x 10^18 electrons (d) 6.25 x 10^18 electrons
8. if the current through a circuit is 5A, what charge passes in 10 seconds?
(a) 5 C (b) 20 C (c) 50 C (d) 5000C
9. The potential difference across a 3 ohm resistor is 6 V. the current flowing in the resistor will be:
(a) 5A (b) 2A (c) 21A (d) 10A
10. the unit of electrical resistance is:
(a)coulomb (b)ohm (c) volt (d) ampere
11. keeping the the potential difference constant, the resistance of the circuit is halved. the current will become
(a) double (b) 4 times (c) half (d) one third
12.The substance having infinitely high electrical resistance is called:
(a)superconductor (b)conductor (c) resistor (d) insulator
13. when the diameter of a wire is doubled,its resistance becomes:
(a)one -half (b) one-fourth (c) one-tenth (d)double
Answer :
1.(b)
2.(d)
3.(C)
4.(d)
5.(b)
6.(C)
7.(d)
8.(c)
9.(b)
10.(b)
11.(a)
12.(d)
13.(b)
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