Question # 1

The combined resistance of two identical resistors, connected in series is 8Ω. Their combined resistance in a parallel arrangement will be:

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2 Ω

4 Ω

8 Ω

12 Ω

an additional wire used along with live and neutral wire is:

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cable wire

earth wire

grip wire

hot wire

an ideal voltmeter is that which draws:

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small current

no current

high current

none of these

What happen to the atomic number of an element which emits one alpha particle and a beta particles.

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Increases by 1

Stay the same

Decrease by 2

Decrease by 1

battery is one of the source of:

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heat

light

current

sound

in a dry cell, chemical energy changes into:

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mechanical energy

electrical energy

potential energy

kinetic energy

Circuit breaker works on the principle of:

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Electric current

Magnetism

Electromagnetism

Electrostatics

The temperature at the centre of sun is.

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10 million k

20 million k

30 million k

35 million k

When 1 tonne of coal is burnt then amount of energy is released .

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36 x 10⁸ J

36 x 10⁹J

36 J

36 x 10¹⁰J

for which of following ampere second could be the unit:

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energy

current

charge

power

Which among the following radiation has more penetrating power?

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A beta pareticle

A gamma particle

An alpha particle

None of these

The half life of radium 226 is

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1600 year

1610 years

1620 years

1630 years

a fuse is connected in series with:

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neutral wire

live wire

earth wire

cable wire

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