Question # 1

Two vector can be added by simple arithmetical method when they are at an angle of.

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120^o

90^o

0^o

45^o

For a gas obeying Boyle's Law, if the pressure is doubled, the volume becomes.

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Double

Three fold

One half

Remains the same

The area between velocity time graph and the time axis is numerically equal to.

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?Speed of object

Distance covered by the object

Average velocity of the object

Acceleration of the object.

Parallel vectors of same magnitude will be

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Equal

Opposite

Both a and b

None of these

The magnifying power is also called

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Resolving power

Angular magnification

Strength of eye

None of these

When hot and cold water are mixed, the entropy.

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Decreases

Increases

Remain constant

Zero

The concentration of red blood cells in the blood is nearly.

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40%

60%

25%

50%

The efficiency of a Carnot Heat Engine is 100% if temperature of sink T2 is.

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0 ^oC

0 K

0 ^oF

100 K

If a rocket is accelerating upward with an acceleration of 2 g, an astronaut of weight, mg in the rocket shows apparent weight.

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Zero

Mg

2 mg

3 mg

Identity the non conservative force among the following.

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Frictional force

Electrical force

Gravitational force

Elastic restoring force

Sound waves are

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Electromagnetic waves

Transverse waves

Compressional waves

Matter waves

For 2.450 no. of significant digits.

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2

1

3

4

A man weight 1000 N in a stationary lift. If the lift moves up with an acceleration of 10 ms-2. then its weight becomes.

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1000 N

2000 N

3000 N

0 N

Damping is the process in which energy

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Increases

Remains constant

Dissipates

None of these

Computer Chips are made of

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carbon

Gemanium

Silicon

Sodium

One revolution is equal to.

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90^o

180^o

360^o

270^o

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A ray of light is a line

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Parallel to wave front

Normal to wave front

Anti-parallel to wave

Any one of these

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