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Khelo dimag se......

Total questions: 10

Worksheet time: 4mins

Name
Class
Date
1.

I am a device who does not allow excessive current to flow through an electric circuit.

a)

Voltmeter

b)

ammeter

c)

Fuse

d)

Bulb

2.

Name the material which is use in bulb's filament

a)

Copper

b)

Tungsten

c)

Tin

d)

Nichrome

3.

Two resistance both of 6 ohm are connected in parallel.Calculate their equivalent resistance.

a)

3 ohm

b)

2 ohm

c)

6 ohm

d)

12 ohm

4.

For metals and alloys of metal the resistivity

a)

decreases with temperature

b)

increase and then decrease with temperature

c)

Remains constant

d)

increase with temperature

5.

An electric kettle is rated 500 W,220 V.It is used to heat water for 30 seconds.Assuming the voltage to be V, Calculate the heat produced.

a)

20000 J

b)

15000 J

c)

21000 J

d)

16000 J

6.

I convert electrical energy to mechanical energy

a)

Motor

b)

generator

c)

Fuse

d)

Resistor

7.

Fleming's Left hand rule is used to find

a)

energy

b)

magnetic field

c)

force

d)

current

8.

To find the direction of induced current we use

a)

Fleming's left hand rule

b)

Fleming's right hand rule

c)

Thumb rule

d)

None of the above

9.

when live wire and neutral wire comes in contact with each other is called

a)

overloading

b)

short circuit

c)

fluctuation

d)

Earthing

10.

Color of live wire is

a)

green

b)

red

c)

blue

d)

black