Question # 1

The critical temperature of mercury is.

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1.18 K

4.2 K

3.72 K

7.2 K

One of the applications of electrostatic induction is

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Laser

Photocopier

X ray machine

Wilson cloud chamber

Two opposite point charge of same magnitude separated by distance 2d, electric potential mid way between them is.

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1 V

2 V

Zero

V/2

The highest value reached by the voltage or current in one cycle is called.

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Peak ot peak value

Peak value

Instantaneous value

Root mean square value

Selenium is

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Insulator is dark

Insulator in light

Conductor in dark

Semi conductor in dark

If 1 x 10⁷ electrons passes through a conductor in 1.0 micro second , then the current is.

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2 A

1.6 A

2.6 x 10^-6 A

1.6 x 10^-6 A

Galvanometer is sensitive when C/BAN is

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zero

Large

small

Negative

The types of quacks are.

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2

3

4

6

The sensor of light is.

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Transistor

LED

Diode

Light dependent resistance

A positron is an anti particle of.

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Proton

Electron

Neutron

Photon

In RLC series circuit at resonance the phase difference between capacitor and inductor reactance is.

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90^o

270^o

0^o

180^o

For rectification we use.

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Transformer

Diode

Choke

Generator

The capacitance of a capacitor depends upon.

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Thickness of plates

Charges on the plates

Voltage applied

Geometry of the capacitor

The electric flux through closed surface depends upon

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Charge

Medium

Geometry

Charge and Medium

Compton effect proves.

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Wave nature of radiation

Wave nature of particle

Dual nature of particle

Particle nature of radiations

In photovoltaic cell, current is directly proportional to.

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Wavelength of light

Intensity of light

Energy

Frequency of light

the substances in which the atoms do not form magnetic dipoles are called.

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Diamagnetic

Para magnetic

Ferro magnetic

Crystal

In three phase A.C. generator the phase difference between each pair of coil is.

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45^o

90^o

120^o

60^o

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