Question # 1

A collision in which K.E. of the system is not conserved is

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Elastic collision

Inelastic collision

3rd low of motion

None of these

The ratio of size of image and size of object is

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Focal length

Magnification

Resolving power

Principle focus

A spring has a spring constant k. If it is cut in two equal parts, the spring constant of each part will be

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K

2 K

K/2

4K

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

One radian is equal to.

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75.3^o

57.3^o

35.7^o

73.3^o

In an object is placed in between focus point and Opticla center of a convex lens, the image formed by lens is.

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Real inverted

Virtual diminshed

Virtual inverted

Virtual erected

Entropy of measure of.

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Internal energy of system

Order of system

Disorder of system

Potential energy of system

A body covers a distance of 10 m in 1 sec with a constant velocity of 10 ms-1 , Acceleration produced by the body is.

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0 ms-1

2 ms-2

5 ms-2

10 ms-2

The frictional force is

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Conservative force

Non conservative force

Electric force

Magnetic force

Pressure of fluid will be low where speed of fluid is.

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Low

Zero

High

Constant

When the projectile reaches the highest point of trajectory, the vertical component of velocity becomes.

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Small

Zero

Maximum

Vi cos

In reversible process the entropy of system.

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Remain constant

Decrease

Increase

Becomes zero

The speed of stars and galaxies can be calculated by

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Compton effect

Stefan's law

Doppler's effect

Pascal's law

The resultant of two vectors having magnitude 10 N and 8 N Can not be

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2 N

9 N

18 N

20 N

Fringe spacing is inversely proportional to.

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Wave length

Slit separation

Distance between the slit and screen

Frequency of light

The law of conservation of energy is the basis of.

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Stream line flow

Equation of continuity

Bernoulli's equation

Venture relation

Height of geo stationary orbit of the satellite above the earth is.

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300 km

250 km

400 km

None of these

The moment of inertia is analogue to

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Mass

Weight

Torque

Force

The light energy travels in space as waves was firstly proposed by

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Maxwell

Young

Einsten

Hydrogen

If the temperature of sink is absolute zero then the efficiency of heat engine engine should be.

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100%

50%

Infinite

zero

Critical angle is that angle of incident ofr which angle of refraction is.

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90 ^o

45 ^o

42 ^o

24 ^o

Efficiency of a heat engine working between 27 ^oC and 32 ^oC will be.

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50%

90%

40%

62%

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