Question # 1

Amount of heat required to raise the temperature of a body through 1 K is called its

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Specific heat

Water equivalent

Thermal capacity

Entropy

High speed meteors rushing through air reduces to ashes because of:

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Force of gravity

High resistance of air

Drag force

None of these

Three quarks make:

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An electron

A meson

A baryon

A photon

None of these

A body is thrown from a height h with speed u, it hits the ground with speed V

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The value of V is maximum if the body is thrown vertically downward

The value of V is maximum if the body is thrown vertically upwards

The value of V is minimum if the body is thrown horizontally

The value of V does not depend on the direction of which it is thrown

The string of a simple pendulum should be:

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Heavy

Extensible

In-extensible

None of these

A voltmeter is used to measure the

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potential difference

current

temperature

resistance

Ethanol (alcohol) is a type of:

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Electric fuel

Bio fuel

Nuclear fuel

None of these

Hertz is unit of:

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Time period

Displacement

Amplitude

Frequency

The effects of bends in a wire on its electrical resistance are:

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Zero

Much larger

Larger

Smaller

None of these

The practical application of the phenomenon of Mutual induction is

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Transformers

Generator

Motor

All of these

How much time, theα-particle more massive than an electron

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600

7000

5000

15000

If a car at rest accelerates uniformly to a speed of 144 km/h in 20 s it covers a distance of

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20 m

400 m

1440 m

2880 m

Moment of inertia of an object does not depend upon

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Mass of object

Mass distribution

Angular velocity

Axis of rotation

A couple produces

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Purely linear motion

Purely rotational motion

Linear and rotational motion

No motion

A PN junction diode cannot be use:

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As rectifier

For converting light energy to electrical energy

For getting light radiation

For increasing the amplitude of an ac signal

Direction of torque can be found out by

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head to tail rule

parallelogram rule

left hand rule

right hand rule

Bernoulli's equation related to pressure, fluid speed and height which is

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An important equation

Principle equation

Fundamental equation

None of these

Newton's laws are empirical laws, deduced from

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Theories

Experiments

Facts

None of these

Which optical fibre is used for shorter distances only?

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single mode step index fibre

multi-mode step index fibre

multi-mode graded index fibre

all of them

Cladding in an optical fiber is used to

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Absorb unneccessary light

Produce total internal reflection

Transmit light

Filter light

The conversion of electrical signals into light signals taken place due to

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Generator

Transmitter

Receiver

None of these

For geosynchronous satellite the orbital time period is

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Greater than earth s spinning time period

Less than earth s spinning time period

Equal to the earth s spinning time period

None of the earth

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