Question # 1

An induced current can be produced by:

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Constant magnetic field

Changing magnetic field

Varying magnetic feild

Constant electric field

None of these

The first series which was identified in the spectrum of hydrogen is called:

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Lyman series

Balmer series

Paschen series

Brackett series

Pfund series

A voltmeter is used to measure the

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potential difference

current

temperature

resistance

If a simple pendulum is shifted from karachi to K-2 cliff, its time period

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remains the same

decreases

increases

none of them

The appearance of the colour in the soap (oil) film results from:

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Dispersion

Interference

Reflection

Refraction

Most of the geysers occur in:

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Volcanic regions

Magnetic regions

Northern region

None of these

Flurescent screen is a screen where visible spot

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vanishes

is made

becomes small and large

none of these

The number of vibrations in two seconds can be expressed as______if frequency of vibration is f.

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f

2 f

3 f

1/2 f

If the distance between two charges is doubled,the force between them will become:

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Double

Half

One third

One fourth

The most suitable material for permanent magnet is

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cobalt

iron

steel

alaminium

The first shell near the neucles is

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L-shell

X-shell

N-shell

M-shell

At what point/points in its path does a projectile have its maximum speed ?

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At the point of projection

At the point where its strikes the ground

Both

None of these

The torque acting on a body is the rotational analogue of

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Mass of the body

Linear kinetic energy of the body

Linear velocity of the body

Force in linear motion

Which of the following quantities has not been expressed in proper units?

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Stress/Strain= Newton/metre²

Surface tension = Newton/metre

Energy = kg m/s

Pressure = newton/metre²

Inverse square law for luminance is valid for

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Search light

Isotropic point source

Cylindrical source

All types of sources

The efficiency of a practical heat engine:

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Can be 100%

Can not be 100%

Is always Zero

None of these

Consult page 50 of your text and trick the correct statement.

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Velocity of x-rays is greater than velocity of light

Velocity of right light is less than velocity of radio waves

Velocity of light, x-rays and radio waves is the same

None of the above is correct

A frame of reference stationed on Earth in approximately an example of

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Inertial frame

Non-inertial frame

Every frame

None of these

A finite volume of gas consists of molecules

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Very small

Large

Very large

None of these

A body is dropped from a tower reaches the earth surface in 4 sec where g is 10 m/s²the height of tower is

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80 m

20 m

160 m

40 m

Moment of inertia does not depend upon

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Angular velocity

Mass

Position of axis of rotation

None of these

The temperature of igneous rocks is about

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100 ^oC

200 ^oC

250 ^oC

270 ^oC

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