Chapter 5 Mcqs - Current Electricity

Question 1

A current of 10 mA is flowing through a wire for 10 s. What is the amount of charge flowing through the wire?

Answer 1

10 -1 C

Question 2

1 A current is passing through a conductor. How many electrons pass through its any cross-sectional area in one second?

Answer 2

6.25 x 10^18 electrons

Question 3

A voltage applied on the bulb is doubled then its power becomes

Answer 3

4 times

Question 4

Electron is not the unit of

Answer 4

Electric potential

Question 5

By applying a potential difference of 10 V across a conductor, a current of 1.5 A passes through it. How much energy would be obtained from the current in 2 minutes?

Answer 5

1.8 kJ

Question 6

Ohm is the unit of

Answer 6

specific resistance

Question 7

If a 4 kilo-ohm and 2 kilo ohm resistances are connected in parallel, their equivalent resistance is

Answer 7

1.3 kilo ohm

Question 8

If a current through a fixed resistance is doubled then energy dissipation is 4 times

Question 9

Fuse is always connected in series with

Answer 9

live wire

Question 10

With increase in temperature of thermistors, its resistance

Answer 10

may decrease or increase