Question # 1

If the potential difference across two plates of capacitor is doubled, then energy stored in it will be.

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Two times

Eight times

Four times

Remain same

Subatomic particles are divided into groups.

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Photon

Laptons

Hadrons

All of these

In glass, molecules are irregularly arranged so it is known as.

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Solid

Liquid

Solid liquid

Gas

Einstein was awarded Nobel prize in physics in

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1905

1911

1918

1921

A rheostat can be used as variable resistor as well as a-------------

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Potential divider

Current divider

Wheat stone bridge

Power divider

The e/m of a neutron is

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Less than electron

The same as electron

Zero

Greater than election

I amu =

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9.31 MeV

931 MeV

9.031 MeV

None of above

In the Bohr's model of the hydrogen atom, the lowest orbit corresponds to:

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Infinite energy

Maximum energy

Minimum energy

Zero energy

The basic circuit element in A.C. circuit which controls current.

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Resistor only

Capacitor only

Inductor only

All of these

The unit of conductivity is:

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Ohm^-3m^-1

Ohm m^-1

Both a and b

Ohm m^-1

Lenz's law was given by Heinrich lenz in:

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1894

1904

1854

1834

The rest mass x ray photon is

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Infinite

Zero

1.67 X^-17 kg

All of the above

The unit of Plank's constant 'h' is.

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JC

J/C

JS

J/S

Direct current can not flow through.

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Inductor

Resistor

Transistor

Capacitor

The curie temp for iron is about

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800^oC

740^oC

750^oC

650^oC

A° is the unit of:

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Energy

Length

Nuclear energy

Work

When transistor are used in digital circuits they usually operate in the :

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Active region

Break down region

Saturation & cutoff regions

Linear region

Electric power:

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Vx1

V²x1

V/1

V/1²

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