Question # 1

For the angular momentum of a system to remains constant, the external torque should be

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small

Large

Neither small nor large

zero

Which of the following is not true.

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Velocity can be nagative

Velocity is a scalar

Speed is a vector

Speed can be negative

The gravitational field strength at a point p on the earth's surfae is numerically equal to.

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The acceleration of free fail at p

The change in P.E. per unit distance at P

The work done in bringing unit mass from infinity to P

A rocket propulsion is based on the principle of.

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Conservation of momentum

Conservation of mass

Conservation of energy

Floatation

In simple harmonic motion we have the conservation of.

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K.E.

P.E

Total energy

Electrical energy

The process of getting energy by direct combusting method from the waste products is commonly known as.

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Solid waste

Depletion region

Green house

Fregmentation

MT-2 is the dimensionless formula of.

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Moment of iniertia

Viscosity

surface tension

Angular acceleration

A negative acceleration does not necessaryimply.

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Decreasing speed

An increasing distance

An increasing speed

A decreasing distance

When a body is lifted through a height 'h' the work done on the body appears in the form of.

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K.E

P.E

Heat

Density

A mass accelerates uniformly when the resulting force acting on it.

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is zero

Is constant but not zero

Increases uniformly w.r.t time

Is proportional to the displacement of the mass from a fixed point

A body is in a static equilibrium, only when it is

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Moving with uniform velocity

Moving with variable velocity

Moving with uniform acceleration

at rest

Which of the following is dimensionless.

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Strain

Stress

Pressure

Volume

A force of 20 N is applied on an elastic spring if the extension produced in the springs to cm, the value of spring constant.

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2 Nm-1

20 N m-1

200 N m-1

2,000 N m-1

What is the period of geostationary satellite.

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6 hours

12 hours

18 hours

24 hours

For which of the following objects is the centre of mass equidistant from every point on its surface

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An unsharpened pencil

A gramophone record

An egg

A table tennis ball

tuning a radio set is an example of.

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Musical resonance

Electrical resonance

Mechanical resonance

Damping

Which one of the following pairs does not have the same dimensions.

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Force and weigfht

Pressure and stress

Capacitance and resistance

Energy and work

A fixed pulley is emplyed to

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Do some work

Change the directionof force

Do more work with the same force but without using the pulling

Have mechanical advantage greater than 1

A body in equilibrium may not have

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Velocity

Momentum

Acceleration

K.E

Which vector gives the displacement from one point another in space.

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Null vector

Position vector

Unit vector

Distance vector

If mass attached to a spring increases then its time period.

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Increases

Decreases

Remains constant

Decreases slightly

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