Question # 1

Angular momentum

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Scalar

Axial vector

Polar vector

At 45° angle

Experiments revealed that the ratio of the stress to the strain is a constant value for

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different material

all materials

a given material

all of them

A heat engine is that which converts

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mechanical energy into thermal energy

thermal energy into mechanical energy

K.E into potential energy

heat energy into light energy

The speed of sound in a medium depends on

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The elastic property but not on the inertia property

The inertia property but not on the elastic property

The elastic property as well as the inertia property

Neither the elastic property nor the inertia property

The ratio of velocity of sound in air at 4 atm pressure and that at 1 atm pressure would be

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1 : 2

4 : 1

1 : 4

2 : 1

The charge carriers in electrolyte are positive and negative

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protons

electrons

ions

none of these

Maximum work is done when force and displacement are

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Parallel

Antiparallel

Perpendicular

Both a and b

A current carrying conductor is placed at right angle to the magnetic field. The magnetic force experienced by the conductor is

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minimum

maximum

zero

none of these

A shunt resistance parallel to the galvanometer is used to convert it into

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avometer

millimeter

voltmeter

none of these

If an iron ball and a wooden ball of the same radius was released from a height 'h' in vacuum, then time taken by both of them to reach ground will be

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Unequal

Exactly equal

Roughly equal

Zero

If a force of 0.05 N produces an elongation of 20 mm in a string, then its spring constant will be:

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250 N m^-1

25 N m^-1

2.5 N m^-1

None of these

Polaroids are used in

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Sun glasses

The production and analysis of plane polarized light

Stereoscopic motion picture

All of these

We can use Fibre optics system for

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Image transmitting

Word processing

Image processing and recelving

All

At the point of contact of the lens and the glass plate, the Newton's ring is

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dark

bright

either of them

neither of them

Which one is the case when the wavelength is actually changed?

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When source move relative to observer

When observer move relative to source

When observer moves around a stationary source at the center of circle

When the relative displacement between source and observer is zero

Crystalline solids are also

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Metals

Ionic compound

Ceramics

All of them

The electrical resistance of mercury disappeared below temeprature

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2.1 K

3.4 K

4.1 K

4.2 K

Kilowatt-hour is a unit of

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Power

Energy

Electrical Energy

None of these

According to the Hooke's law the force required to change the length of a wire by '1' is proportional to:

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1^-2

1^-1

1

The image formed after objective lens of an astronomical telescope is

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Inverted

Diminished

Real

All of these

Which of the following is not a projectile?

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a bullet fired from a gun

a spaceship

a football in air

an artillery shell

The light source in the transmitter can be either

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Light emitting diode

Semiconductor laser

Light emitting in an invisible infra red

All of these

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