Question # 1

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

the resistance of an ammeter should be:

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high

very high

low

constant

Radiation was found in:

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1896

1895

1897

1898

Which radiations are free of effect of electric and magnetic field?

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Alpha

Beta

Gamma

Alpha and beta

When a potential of 10 volt is applied across a conductor, a current of 5 miliampere flows through it, the resistance of the conductor will be:

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200 ohm

2000 ohm

0.2 ohm

0.002 ohm

Isotopes are atoms of same element with different :

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Atomic mass

Atomic Number

Number of proton

Number of Neutron

What happen to the atomic number of an element which emits one alpha particle?

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Increase by 1

Stays the same

Decrease by 2

Decrease by 1

Watt is equal to:

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Coulomb per second

Newton per second

Volt per second

Joule per second

The half life of argon nuclide Ar-40 is:

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2 x 10⁸years

2 .2x 10⁸years

2.4x 10⁸years

2.8x 10⁸years

diamond des not conduct electricity, because it has no:

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free electrons

free protons

free neutrons

free positive charge

A digital multimeter is used to measure:

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Current

Resistance

Potential difference

All of above

for which of following ampere second could be the unit:

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energy

current

charge

power

earth wire is connected with those appliances whose casing is made of:

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metals

wood

glass

plastic

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