Question # 1

The dimension of power is

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MLT-1

ML2T-2

ML2T2

ML2T-3

The fringe spacing increases if we use.

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Yellow light

Green lgiht

Blue light

Red light

Multimode step index fibre is useful for

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Long distances

Short distances

Better quality

Low price

Oil film floating on water exhibits colours due to

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Interference

Diffraction

Polarization

All of these

A ray of light shows the direction of propagation of light It is line which is.

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Normal to the wave front

Parallax to the wave front

Opposite to the wave front

Equal to the wave front

At which place the motion of a simple pendulum will be slowest.

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Karachi

K-2

Murree

Lahore

For angular momentum of system to remain constant, external torque should be.

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Small

Large

Zero

None

The curve representing an adiabatic process is called.

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An adiabatic

An isotherm

Both of these

None of these

If heat is added to a system, then its entropy will.

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Increases and positive

Decrease and positive

Increases but negative

Decreases but negative

Heat is form of.

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Power

Momentum

Energy

Torque

If the slope of a velocity time graph gradually decreases than body is said to be moving with

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Positive acceleration

Negative acceleration

Uniform velocity

None

The kinetic energy of molecules of an ideal gas at absolute zero is

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Very low

Very high

Zero

First increases then decreases

The dimension of power are

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[ML2T-3]

[ML2T-2]

[MLT-1]

None of these

the locus of all pint in the same wave of vibration is called.

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Wave front

Diffraction

Interference

Polarization

If a body is moving in the counter clockwise direction the direction of angular velocity will be

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Toward the centre

Away from the centre

along the linear velocity

Perpendicular to both radius and linear velocity

The entropy of the universe with passage of time is.

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Increases

Decreases

Remain constant

Increases and decreases

A convex lens can be used as

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Simple microscope

Compound microscope

Telescope

Spectrometer

The branch of physics which deals with the study of production, propagation and properties fo sound waes is called.

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Heat and thermodynamcis

Optics

Acoustics

Mechanics

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