Question # 1

Cathode ray oscilloscope works by deflecting a beams

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Neutrons

Protons

Electrons

Positron

An ideal current source shall have resistance

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Zero

Finite but not zero

Infinite

Depend upon requirement

The unit of radioactivity is:

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Bequerel

Henry

Pascal

Joule

The conductors having the conductivity of the order of

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Charge on an atom is:

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Positive

Negative

Neutral

None of these

Balmer Empirical formula explains the electromagnetic radiation of any excited atom in terms of their.

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Energy

Mass

Wave length

Momentum

Lenz's law is a consequence of the law of conservation of

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Charge

Momentum

Energy

Angular momentum

The energy of photon for photoelectric effect is less than

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1 MeV

2 MeV

5 MeV

8 MeV

S.I unit of strength of electric field is

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J/C

C/V

V/C

N/C

The output of two input is zero only when its.

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Both inputs are zero

Either input is zero

Both inputs are one

Either input is one

Glass and high steel carbon are example of.

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Ductile substances

Brittle substances

Soft substances

Hard substances

Lenz's law was given by Heinrich lenz in:

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1894

1904

1854

1834

The number of neutrons in Li are

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2

3

4

7

Which of the following basic force is able to provide an attraction between two neutrons:

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Electrostatic and nuclear b

Electrostatic and gravitational

Gravitational and strong nuclear

Only nuclear force

The thermistors convert changes of temperature into.

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Light energy

Electric voltage

Heat

Sound

The induction can be increased by winding the wire around a core made of.

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Copper

Silicon

Iron

Aluminum

The most useful tracer is.

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Strontium -90

Iodine -31

Cobalt -60

Carbon -14

Charge on an electron was determined by

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Ampere

Millikan

Maxwell

Bohr

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