Question # 1

Temperature changes when two balls collide which one of the following is conserved.

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Angular momentum

linear momentum

Velocity

Kinetic energy

tuning a radio set is an example of.

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Musical resonance

Electrical resonance

Mechanical resonance

Damping

The fundamental quantities which form the base of the SI are.

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mass, energy and time

mass, force and time

mass, length and time

mass , length and time

Which of the following is SI base unit for temperature.

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Celsius

Kelvin

Fahrenheit

Rankine

Work has the same dimensions as that of

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Power

Liner momentum

Angular momentum

Torque

Which are the two basic properties of a vector.

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Curvature and direction

Magnitude and direction

Magnitude and sign

Curvature and sign

The centre of gravity of a rectangular or parallel gram shaped plate is.

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At the centre

At the intersection of diagonals

At the intersection of medians

At the axis of rotation

A force of 50 N acts on a body for 10 s the change in momentum will be.

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5 N s

200 Ns

500 Ns

800 N s

It the slope of velocity time graph is increasing with time the body is said to have.

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Positive acceleration

Average acceleeration

Uniform acceleration

Retardation

The circular motion of a particles with constant speed is.

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Periodic and SHM

Periodic but not SHM

SHM and not periodic

Neither periodic nor SHM

The dimension of momentum is.

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[MLT-1]

[ML2T-2]

[ML3T-2]

[MLT-1]

If a gymnast sitting on a rotating stool with his arms out stretched lowers his arms.

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The angular speed increases

The angular speed decreased

The angular speed becomes zero

The angular speed becomes constant

A girl weighing 400 N takes 4 s to run up the stairs How much P.E. does she gain if height of the stairs is 3 m.

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120 J

400 J

200 J

1200 J

If a vehicle is to gain momentum it must

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Lose weight

Move slowly

Lose inertia

Accelerate

when a body accelerates.

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Its direction always changes

Its mass always changes

Its velocity always changes

It falls towards the earth

The source of geothermal energy is

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The fusion in the sun

the radioactive decay in the earths interior

the rotation of earth around the sun

The rotation of earth around its own axis

By decreasing angle between two vectors their cross product.

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Increases

Decreases

Remains the same

Vanishes

The action and reaction forces

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Must act upon the same body

Must act upon different bodies

Must be equal in magnitude but need not have the same line of action.

Different speed at the different height during ascent and during descent.

Which of the following is a properly of a uniform gravitational field.

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If acts equally in all directions.

Its field strength is the same at all points with in it

the gravitational potential has the same value of all points with in it

It produces zero force on a stationary test mass placed in it.

A body of mass 2 kg is suspended from the celling of an elevator moving up with an acceleration 'g' its apparent weight in the elevator will be.

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9.88 N

19.8 N

29.4 N

39. 2 N

Which of the following is a unit of electric field strength.

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c m-1

v m-2

N C-1

N V-1

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