Question # 1

The mass of protons is:

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1.675 x 10^-27 kg

1.693 x 10^-27 kg

1.673 x 10^-31 kg

1.673 x 10^-27 kg

The "toner" of photocopier is given:

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Positive charge

Negative charge

Remains neutral

All of above

Brightness of screen of CRO controlled by

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Grid

Filament

Anode

Cathode

The electric potential at a mid point in an electric dipole is.

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0 V

0.5 V

1 V

1.5 V

Charge on an electron was determined by

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Ampere

Millikan

Maxwell

Bohr

If a low resistance is connected parallel to a galvanometer then galvanometer is converted.

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Ammeter

Voltammeter

Ohmmeter

Multimeter

In photocopier, then drum is coated with layer of.

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Aluminium

Copper

Selenium

silver

If an electron is prijected in a magnetic field with velocity V, it will experience a force

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Kirchhoff's first rule is the manifestation of the law of conservation of.

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Mass

Charge

Energy

Momentum

The SI unit of relative permittivity is.

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Fm-1

C2N-1m-2

Nm2C-2

No unit

Energy needed to produce an electron hole in solid state detector is.

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1 to 2 eV

3 to 4 eV

6 to 7 eV

8 to 9 eV

The conductors having the conductivity of the order of

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If both the length and radius of the rod are doubled, then the modulus of elasticity will:

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Increase

Decrease

Remains the same

Doubled

An electron miroscope emplys which to one of the following particles?

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Electron ahve a wave nature

Electrons can be focused by an electric field

Electrons can be focused by a magnetic field

All of the above

Greater concentration of impurity is added in.

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Base

Emitter

Collector

LED

The principle regarding the dual nature of light was first discovered by

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Compton

J.J.Thomson

De-Broglie

Heisenberg

A metal rod of 1 m is moving at a speed of 1 ms-1 in a direction making an angle 30^o with 0.5 T magnetic field . The emf produced is.

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0.25 N

2.5 N

0.25 V

2.5 V

The fact that electric field exist in space around an electrical charge is

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Electrical property

Gravitational property

Intrinsic property of nature

Extrinsic property of nature

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