Question # 1

The photo copying process is called

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Xerography

Inkjet Printer

Both (a) and (b)

None of these

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

For an atom of hydrogen atom the radius of the first orbit is given by:

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H/me²

me/4h²

h2/4π² kme²

h² me²

Presence of dielectric always.

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Increase the electrostatic force

Reduces the electrostatic force

Do not effect electrostatic force

Doubles the electrostatic force

Resistivity at a given temperature depends upon.

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Area of cross section

Length

Nature of material of conductor

Both length and area

If the north pole of a magnet moves away from a metallic ring

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Clockwise

Anticlockwise

First clockwise and then anticlockwise

None of above

Absorbed Dose 'D' is defined as

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m/E

E/C

C/m

E/m

If 13.6 eV energy is required to ionize the hydrogen atom, then the required energy to remove an electron from n=2 is:

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10.2 eV

0 eV

3.4 eV

6.8 eV

A positron is a particle having.

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Mass equal to electron

Charge equal to electron

Mass equal to mass of electron but charge opposite to charge of electron.

Mass equal to proton

Ampere's law is applicable to:

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Circular path

Rectangular path

To any closed path

Nonwe of these

A moving charge is surrounded by:

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2 Fields

3 Fields

4 Fields

None of these

Seven resistances are connected as shown in the figures . THe equivalent resistance between A and B is:

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3Ω

4Ω

4.5Ω

5Ω

When the K.E. of photoelectric is zero, the frequency of incident photon is.

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Less than

greater than

Equal to

Much greater

The series in visible region is:

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Balmer series

Pfund series

Paschen series

None of above

The number of Neutron is²³⁸U₉₂is

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92

238

146

330

Electric flux is a

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Vector quantity

Scalar quantity

Both (a) and (b)

None of above

In order to increase sensitivity of galvanometer the value of C may be

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Increase

Decrease

Neither increase nor decrease

Remain same

Charge on an electron was determined by

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Ampere

Millikan

Maxwell

Bohr

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