Question # 1

unit of Plank's constant is same as that of.

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Acceleration

Angular momentum

Linear momentum

Entropy

Earth orbital speed is.

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10 km/s

20 km/s

30 km/s

40 km/s

The "toner" of photocopier is given:

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Positive charge

Negative charge

Remains neutral

All of above

Two metallic sphere of radius 2 cm and 4 cm get equal quantity of charge. Which has greater surface charge density ?

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2^nd sphere

Both have same

First sphere

None of these

By emitting Beta particle and gama particle simultaneously the nucleolus changes in its charges by

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N

N/2

N/4

3N/4

The phase angle of a series RLC circult at resonant frequency is

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1/2

sigma

Zero

sigma /4

The electric intensity due to two oppositely charged plates is

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None of these

The number of electrons in one coulomb charge is equal to

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6.2 x 10¹⁸ electrons

Zero electrons

1.6 x 10^-22 electrons

6.2 x 10²¹ electrons

At 0 K a piece of silicon is a

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Conductor

Semi-conductor

Insulator

All

Power dissipated in a pure inductor is.

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Large

Small

Infinite

Zero

An expression for gain of an inverting amplifier is

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(R₁R₂)

None of these

Shear modulus is expressed as:

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G = tanθ/F/A

F/A/tanθ

F/tanθ

tanθ/A

Automatic function of street light can be done by the use of.

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Inductor

Rectifier

Comparator

emf

A PN junction can not be sued a.

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Rectifier

Amplifier

Detector

LED

Which one is not present in A.C. generator.

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Armature

Magnet

Slip rings

Commutator

During negative half cycle of A.c then p-n junction offers.

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High resistance

Low resistance

No resistance

All of these

Those elements whose charge number z is greater then __________ are unstable:

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80

79

82

83

The movement of conductor in magnetic field produces electrical current was discovered in:

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1931

1731

1842

1831

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