Question # 1

The value of g increases with the :

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Increase in the mass of the body

Increase in altitude

Decrease in altitude

None of the above

Which of the following do not effect evaporation?

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Temperature

Wind

Volume

Surface area of liquid

The value of G is _________ every where:

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Same

Varying

Changing

1.62

A line about which a body rotates is called;

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Axis of rotation

Rigid Body

Center of gracity

None of these

1 KW (kilo Watt) is equal to:

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10² W

10³ W

10⁵ W

10⁶W

The ratio of output to input is called:

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work

Efficiency

Force

All of above

Normal human body temperature is :

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15°C

98.6°C

37°C

37°F

_____________ is an other unit of power.

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J

W

hp

W/J

A minor but sudden fall in atmospheric pressure is followed by

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a storm and a rain

an intense weather

a pleasant weather

a poor weather

Which machine is used to find acceleration due to gravity?

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Centrifuge

Atwood machine

Hydraulic machine

Washing machine

In measurement 1.032 numbers of significant figure are.

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1

2

3

4

Safe level of noise depends on factors:

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One

Two

Three

Four

A device which has two way communication is:

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Television

Radio

Hard disk

Mobile phone.

Formula for time period of spring mass system is represented by:

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T = 2π√m/k

T = 2π √k/m

T = 1/2π√k/m

T = 1/2π√m/k

Which instrument is used to detect current:

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Galvanometer

Voltmeter

Ammeter

Electroscope

Which of the following is a method of energy transfer:

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Conduction

Radiation

Wave motion

All of these

What does a switch do:

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Oppose the current

Open and close the circuit

Store energy

Provide voltage

Release of the energy by the sun is due to:

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Nuclear Fussion

Nuclear Fission

Burning of gases

Chemical reaction

Two uncharged objects A and B are rubbed against each other. When object B is placed near a negatively charged object C, the two objects repel each other. Which of these statements is true about object A.

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Remains uncharged

Becomes positively charged

Becomes negatively charged

Unpredicatable

The difference between the loudness of faintest audible sound and loudness of another sound is called:

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Pitch of sound

Quality of sound

Sound level

Intensity of sound

F=

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qE

q-E

q/E

q+E

If the potential energy of none coulomb charge is one joule then its potential will be:

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5 volt

2 volt

3 volt

1 volt

The acceleration produced by elastic restoring force is

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Perpendicular to force

Opposite to force

In same direction as force

Zero

The focal length of convex lens

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Negative

Positive

small

Large

The law of conservation of energy gives us

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Equation of continuity

Stock's law

Bernoulli's equation

Viscosity

Information carrying capacity of optical fibre called.

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Capacity

Band width

Immunity

Ability

The speed of sound in ari at 0 ^oC is 332 ms-1, Then the speed at 40 ^oC will be

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372 ms-1

356 ms-1

346 ms-1

332 ms-1

The maximum range of projectile is 100 km, Take 9=10 ms-2, the initial velocity of the projectile will be.

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1000 kms-1

1 kms-1

10 kms-1

100 kms-1

The measure of hotness or coldness of a substance is.

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Temperature

Heat

Internal energy

Energy

Energy dissipated usually appears as

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P.E.

Heat Energy

Chemical energy

Nuclear Energy

The produce oscillation, body is pulled away from its

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Mean position

Extreme position

Both a and b

None of these

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An athlete runs with a speed of 12 ms-1. Determine the longest jump he can undertake.

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12 m

14.4 m

24 m

16.2 m

In photocopier, then drum is coated with layer of.

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Aluminium

Copper

Selenium

silver

When the medium is insulator the elecrostatic force between the charges is

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Decreased

Zero

Increased

None of above

If the number of turns become double but length remain same, then magnetic field in the solenoid become.

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Half

Double

Remain same

Zero

The device which allows only the flow of D.C. is.

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Capacitors

transformer

Inductor

Generator

The curie temp for iron is about

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800^oC

740^oC

750^oC

650^oC

If the potential difference across two plates of capacitor is doubled, then energy stored in it will be.

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Two times

Eight times

Four times

Remain same

The force which is responsible for the breaking up of the radioactive element is.

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Weak nuclear force

Strong nuclear force

Electromagnetic force

Gravitational force

If a charge is at rest in a magnetic field then force on charge is

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Zero

Double

One fourth

Four times

Mass equivalent of 931 MeV energy is:

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6.02 x 10^-23 kg

1.766 x 10^-27kg

2.67 x 10^-29kg

6.02 x 10^-87kg

Which is not characteristic of Laser.

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Monochromatic

Coherent

Intense

Multi direction

Which of the following quantities remain constant in step up transformer?

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Current

Voltage

Power

Heat