Question # 1

the shortest distance between two points is called.

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Speed

Acceleration

Distance

Displacement

In thermodynamics system internal energy decrease by 100 J and 100 J of work done on the system then heat lost will be.

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Zero

100 J

200 J

-200 J

The collision between the gas molecules is

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Elastic

Inelastic

Both a and b

None of these

the locus of all pint in the same wave of vibration is called.

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Wave front

Diffraction

Interference

Polarization

When two waves having same frequency traveling in same direction combine, phenomenon is called

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Wave motion

Combination of waves

Interference

Diffraction

Pi radian is equal to.

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0^o

90^o

180^o

57.3^o

The efficiency of any heat engine can never be

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+ve

100%

-ve

None of these

The amount of inertia of 10 kg hoop about the axis of rotation perpendicular to its plane having radius 5 m is

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50 kgm2

100 K gm2

150 K gm2

250 K gm2

The work done by centripetal force is

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(-)ve

(+)ve

Maximum

Zero

The frictional force is

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Conservative force

Non conservative force

Electric force

Magnetic force

10 waves pass through a point in 2 seconds with speed 10 ms-1 the frequency of wave will be

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1 Hz

2 Hz

5 Hz

10 Hz

Value of triple point of water is given as.

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Zero K

100 K

273.16 K

373.16 K

A man of 5000 kg moves with an acceralation of 1 ms-2 force acting on it is.

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5 N

500 N

50 N

5000 N

Boltzman constant 'k' has same unit as.

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Temperature

Energy

Entropy

Pressure

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

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

An oil film on water surface shows colour due to.

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Diffraction

Interference

Polarization

Dispersion

When a body is moving along a circular path, then such a motion is called

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Vibratory motion

Rotatory motion

Linear motion

None of these

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