Question # 1

An object undergoes S.H.M has maximum acceleration when its displacement form the means position

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maximum

zero

half of the maximum value

one third of the maximum value

We cannot utilize the heat contents of oceans and atmosphere because

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there is no reservoir at the same temperature

there is no reservoir at the temperature lower than any one of two

there is no reservoir at the temperature higher than any one of two

none of them

When heat is added into the system then change in entropy is

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negative

positive

zero

any one of them

From sand, we get a material used for construction with the motion of bodies under the action of forces is called:

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Optics

Mechanics

Thermodynamics

Astrophysics

The unit of magnetic flux is

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Weber-m²

Weber-m³

Henry

Weber

The closed loop gain of the inverting amplifier is written as

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G = R₂/R₁

G = 1 + R₂/R₁

G = -R₂/R₁

G = 1 - R₂/R₁

Which one of the following Electro-magnetic wave have the highest frequency and shortest wave-length

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X-rays

Ultraviolet rays

y-rays

Cosmic rays

For a moving body, at any instant of time

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If the body is not moving the acceleration is necessarily zero

If the body is slowing, the retardation is negative

If the body is slowing, the distance is negative

If displacement, velocity and acceleration at that instant are known, we can find the displacement at any given time in future

At 'resonance' the transfer of energy from deriving source to the oscillator is

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maximum

minimum

zero

none of them

Light waves are:

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Transverse wave

Longitudinal wave

Compressional wave

None of them

When monochromatic light is allowed to fall on cathode, it begins to emit electrons, these electrons are called

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thermoionic electrons

free electrons

photoelectrons

slow electrons

The uniformly accelerated equations are useful only for

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Angular motion

Curved motion

Linear motion

None of these

A magnetic field

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Always exerts a force on a charged particle

Never exerts a force on a charged particle

Exerts a force on a charged particle if it is moving across the magnetic lines of force

Exerts a force on a charged particle if it is moving along the magnetic lines of force.

Which one of the material is not polymer

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Glass

Natural rubber

Polyethene

Polystyrene

What will be efficiency of carnot engine when it is operated between the temperatures 47^oC and 127 ^oC:

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Reversible

Irreversible

Sometimes A and B

None of these

If the magnification M₁ = 20.0 for objective and M₂ = 12.0 then total magnification is

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200

240

260

280

A particle is acted upon by a force of constant magnitude which is always perpendicular to the velocity of particle.the motion of the particle takes place in a horizontal plane.It follows

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Linear momentum is constant

Velocity is constant

It moves in a circular path

None of these

The S.I. unit of permitivity are

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Nmc^-2

C² N^-1 m^-2

Nm² C^-2

NmC^-1

The splitting of white light into several colors on passing through a glass prism is due to

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Refraction

Reflection

Interference

Diffraction

The renewable energy source is

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Natural gas

Biomass

Tide3s

None of these

The principle of rocket motion is based on the

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First law of motion

Second law of motion

Third law of motion

None of these

The SI unit of strain is

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N

dynes

pascal

dimensionless

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