CBSE - Electricity

1 Electricity What is the measuring equipment called that measures the electric current passing through conductors?
(1) Wattmeter
(2) Ammeter
(3) Galvanometer
(4) Voltmeter

2 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

3 Electricity 

An ammeter can read current upto 5 A and it has twenty divisions between the mark 0 and mark 2A on its scale

The least count of the ammeter is

(1) 0.02 A
(2) 0.01 A
(3) 0.2 A
(4) 0.1 A

4 Electricity A resistance wire of uniform cross section is in the form of a ring. The two diametrically opposite points are connected through a source of emf via an ammeter. A conducting wire is now connected across AB, A1 B3 & then A2B2 one by one .
If ammeter reads I1 , I2 & I3 respectively :

(1) I1 > I2 > I3
(2)  I3 = I1 > I2
(3) I1 = 0,  I2 > I3 
(4) I3 = 0, I1 < I2

5 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

6 Electricity Which country is called the country of Wind mills ?

(1) Holland
(2) Britain
(3) India
(4) America

7 Electricity In house electrical circuit s the fuse wire for safety should be of
(1) High resistance - high melting point
(2) Low resistance - high melting point
(3) Low resistance - low melting point
(4) High resistance - low melting point

8 Electricity It is written 100 watt-250 volt on any bulb. Its resistance will be

(1) 25000 ohm
(2) 625 ohm
(3) 25 ohm
(4) 2.5 ohm

9 Electricity Out of two bulbs 50 W – 220 V and 100 W –220 V, which one will glow brighter

(a) When connected in series

(b) When connected in parallel

(1) (a) 100 W, (b) 50 W
(2) (a) 50W, (b) 100 W
(3) (a) both will glow similar (b) 100 W
(4) none of t he above

10 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