Question # 1

battery is one of the source of:

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heat

light

current

sound

The rating of a fuse wire is always expressed in:

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ampere-hours

KWh

Volts

Amperes

The phenomenon in which radiations convert the matter into positive and negative ions is called:

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Radio activity

Excitation

Ionization

Electrolysis

100x10³ A= :

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10^-3 A

10^-2 A

10 A

10^-1A

isotopes are atom of same element with different.

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Atomic mass

Atomic number

Number of proton

Number of electron

According to ohm’s law V= :

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I²R

IR²

IR

I/R

Isotopes are atoms of same element with different :

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Atomic mass

Atomic Number

Number of proton

Number of Neutron

The Half life of a certain isotopes is 1 day. What is the quantity of isotopes after 2 days?

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One half

One quarter

One eight

None of these

Radiations present in atmosphere due to the presence of different radioactive elements are:

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Cosmic radiations

Background radiations

secondary radiations

Electromagnetic radiations

Release of the energy by the sun is due to:

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Nuclear Fussion

Nuclear Fission

Burning of gases

Chemical reaction

The equivalent resistance of a parallel combination is:

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Equal to sum of all resistance

Is greater than the largest resistance of combination

Is smaller than the smallest resistance of combination

All of these

The temperature at the centre of sun is.

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10 million k

20 million k

30 million k

35 million k

The commercial unit of electrical energy is:

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Joule

Watt

Kilowatt hour

Electron volt

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