Question # 1

For maximum range the angle of projection must be

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30^o

45^o

60^o

90^o

The accepted value for speed of light in vacuum

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2.99 x 10⁸m - sec^-1

2.99 x 10⁶m - sec^-1

2.99 x 10⁸km - sec^-1

2.99 x 10⁸m - h^-1

The SI unit of work is

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Newton

Joule

Mol

Calorie

The focal length of convex lens

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Negative

Positive

small

Large

Before the launch of a rocket the mass of fuel of the rocket is approximately consists of.

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60%

50%

80%

100%

A force of 100 N makes on angle of 60^owith y axis, its horizontal component is.

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50 N

60 N

70.7 N

86.6 N

According to Newton's formula, the speed of sound in air at STP is

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332 ,ms-1

340 ms-1

350 ms-1

280 ms-1

Heat is form of.

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Power

Momentum

Energy

Torque

Minimum number of unequal forces whose vector sum can be zero are.

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5

4

3

2

The curve representing an adiabatic process is called.

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An adiabatic

An isotherm

Both of these

None of these

In red light is used as compare to blue light then fringe spacing.

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Decreases

Remain same

Increases

Becomes zero

S.I Unit of pressure of gas is.

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Nm

N.m

N2/m

N3m

The speed of sound is greater in solids due to their high.

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Density

Pressure

Temperature

Elasticity

Oil film floating on water exhibits colours due to

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Interference

Diffraction

Polarization

All of these

For a diatomic gas Cv= 5R/2 then gamma for this gas is.

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5/7

4/35

7/5

35/4

The power needed to lift a mass of 5000 g to height of 1 m in 2 secnd is

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2.45 watt

24.5 watt

245 watt

2.45 watt

For working of heat engine, there must be.

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A source

A sink

either of these

Both of these

The formula of centripetal acceleration is

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