Question # 1

A direction of torque is

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Along the position vector r

Perpendicular to both r and f

Along the direction of force F

Opposite to the direction of r

A device based upon the thermodynamics property of matter is called.

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Calorimeter

Heat engine

thermometer

Voltmeter

Substances that don't flow easily has

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Large co-efficient of viscosity

Small co-efficient of viscosity

Medium co-efficient of viscosity

Zero-coefficient of viscosity

Value of triple point of water is given as.

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Zero K

100 K

273.16 K

373.16 K

Venturimeter is used ot measure.

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Speed of fluid

Pressure of fluid

Volume of fluid

Mass of fluid

The motion of gas molecules is

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In the same direction

Random

Walls of container

Opposite to each other

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

Maximum number of components of a vector may be

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Infinite

One

two

three

Which quantity of the following is dimensionless.

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Angular velocity

Centripetal force

Angular acceleration

Angular displacement

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 dimensions of angular velocity are

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[LT-1]

[LT-2]

[T-1]

[L-1T-1]

The dot product of two vectors A and B will be zero, if angle between A and B is

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Zero

30^o

90^o

180^o

When a fore of 100 N is acting on an object along x-axis then its vertical component will be.

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50 N

0 N

25 N

10 N

Velocity of sound is independent of

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Temperature

Density

Pressure

Medium

the change in internal energy is defined as

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Q - W

Q-T

Q + P

Q - P

A force applied on a body produces acceleration in

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Opposite direction

perpendicular direction

Its own direction

In any direction

Michelson's interferometer can be used ot find the

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Velocity of light

Wavelength of light

Velocity of sound

Wavelength of sound

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