Question # 1

A.C. can be measure with the help of

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Nuclear effect

Magnetic effect

Chemical effect

Heating effect

The output voltage of half wave rectification is in the form of

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a smooth curve

a smooth wave

pulses

all of the above

A metastable stae:

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Is an excited state

Is that in which excited electron is stable

Is that in which excited electron is usually unstable

Means a time interval of 10^-8second

Both (A) and (C)

In an adiabatic process the work is done at the expense of the

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energy supplied to the system

energy gained from the surroundings

internal energy

none of them

Equal charges are given to two spheres of different radii. The potential will

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Be more on the smaller sphere

Be more on the bigger sphere

Be equal on both the sphere

Depend on the nature of the material of the sphere

Origin of the electric and the gravitational forces

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Was known in 1911 A.D.

Was known in 1811 A.D.

Was known in 1711 A.D.

is still unknown

Was known in 1611 A.D.

When a conductoris moved across a magnetic field:

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Emf induced its similar to that of a battery

Emf induced gives rise to induced current

An emf is induced across its ends

All are correct

None of these

The charge carriers in electrolyte are positive and negative

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protons

electrons

ions

none of these

The time taken by light to travel from moon to earth is:

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80 sec

500 sec

1.802 X 10⁴sec

Aerophysics

Flight of rocket in the space is an example of

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Newton's first law

Newton's third law

Newton's second law

all of them

In a resonance situation the amplitude of the motion may become extra ordinarily large, if

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the driving force is large

the driving force is zero

the driving force may be feeble

all of them

A cane filled with water is revolved in a vertical circle of radius 4 m and water just not fall down The time period of revolution will be nearly

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1 s

4 s

8 s

10 s

Sky seems blue due to

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Diffraction

Polarization

Dispersion

Scattering

Which force is the medium independent force ?

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Electrostatic force

Nuclear force

Gravitational force

All of them

The matter and energy are equivalent, was proposed by

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Newton

Einstein

Maxwell

None of these

A charged oil drop is suspended in a uniform field of 3 x 10⁴ V/m so that it neither falls nor rises.The charge on the drop will be (Mass of charge = 9.9 x 10^-15 kg and g = 10 m/s²)

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1.6 x 10^-18C

3.2 x 10^-18C

3.3 x 10^-18C

4.8 x 10^-18C

Kilowatt-hour is a unit of

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Power

Energy

Electrical Energy

None of these

A prism splits a beam of white light into its seven constituent colors.This is so because

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Phase of different colors is diferent

Amplitude of different colors is different

Energy of different colors is different

Velocity of different colors if different

The ideal gas obey gas law at:

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Low tempratures and high pressures

High temperatures and low pressures

All temperatures and pressures

None of these

What quantity produces the angular acceleration in body

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Momentum

Inertia

Moment of inertia

Torque

When a body moves in a circle in the clockwise direction, the angular displacement Δθ is taken as

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Positive

Negative

Both ways

None of these

Stress beyond which a permanent deformation is observed in a body is called

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Minimum stress

Maximum

Yield stress

Plastic stress

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