CBSE - Electricity

1 Electricity 

What is the direction of induced current in the loop when the current i in the straight wire is (a) increasing (b) steady-

(1) (a) clockwise (b) zero
(2) (a) anticlockwise (b) clockwise
(3) (a) clockwise (b) anticlockwise
(4) (a) anticlockwise (b) zero

2 Electricity The value of equivalent resistance between the points A and B in the given circuit, will be –


(1) 6R
(2) 4R/11
(3) 11R/4
(4) R/6

3 Electricity A certain household has consumed 200 units of energy during a month. Its value in joules will be -

(1) 3.6 × 10¹⁰
(2) 7.2 × 10¹⁰
(3) 3.6 × 10⁸
(4) 7.2 × 10⁸

4 Electricity When 1 J of work is done to move a charge of 1 C from one point to another point then the potential difference between two points in a given circuit will be-

(1) 1 V
(2) 4V
(3) 8 V
(4) zero

5 Electricity What is the resistance between the points A and B ?

1) 3/2 Ω
2) 2/3 Ω
3) 1/2 Ω
4) 2 Ω

6 Electricity One Volt is equal to -

(1) 1 Joule
(2) 1 Newton/Coulomb
(3) 1 Joule/Coulomb
(4) 1 Coulomb/Newton

7 Electricity The unit of electrical energy is

(1) watt
(2) killowatt
(3) kilowatt per hour
(4) kilowatt hour

8 Electricity  An AC generator is connected to an electric appliance. In 10 revolutions of the armature the current in the appliance changes direction :

(1) 5 times
(2) 10 times
(3) 20 times
(4) 40 times

9 Electricity What is the equivalent resistance of the following arrangement between M and N



(1) R/2
(2) R/3
(3) R/4
(4) R/6

10 Electricity Out of two bulbs 50W - 220 V and 100W-220V, which one will glow brighter if

(a) connected in series (b) when connected in parallel

(1) (a) 50 W (b) 100 W
(2) (a) 100 W (b) 100 W
(3) (a) 100 W (b) 50 W
(4) none of the above