Question # 1

In microwave ovens, heating is produced by the phenomena of

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Reflection

Refraction

Damped oscillations

Resonance

For maximum range angle of projection of the projectile should be

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45 ^o

90^o

120 ^o

180 ^o

If the average velocity of an object is zero in some time internal the displacement of the object for that intercanal will be.

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Infinite

zero

Increase

Decreasing

A physical quantity which produces rotation in a body is called.

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Force

Torque

Momentum

accelerate

If the vector sum of all the torques is zero then

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1st condition is satisfied

2nd condition is satisfied

Centre of mass is lowered

Gravity becomes zero

The dimensions of moment of inertia are

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[ML2]

[MLT-1]

[ML2T-1]

[ML-1T-2]

When damping is small amplitude of vibrational resonance will be

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small

Large

Infinite

Un changed

Angular momentum of a body under a central force is

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Zero

Maximum

Minimum

Constant

If the resultant of two forces, each of magnitude F have the magnitude F, angle between the forces will be.

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30^o

80^o

90 ^o

120 ^o

Which of the following is dimensionless.

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Strain

Stress

Pressure

Volume

The moment of inertia depends upon

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Mass of the body and its radius

Mass of the body and its angular speed

Mass and angular momentum

Mass as well as the distribution w.r.t axis of rotation

If the K.E. of a body becomes 4 times of its initial value, the new momentum will be

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half

Same

Double

4 times

A body at rest may have

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Speed

Momentum

Acceleration

Energy

What is the period of geostationary satellite.

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6 hours

12 hours

18 hours

24 hours

Which of the following quantities has three significant figures.

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3.0066 m

5.05 x 10^-27 kg

301.0 s

1.009 m

The mass that appears in Newton's second law is known as.

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Rest mass

Gravitational mass

Inertial mass

Weight

An example of forced oscillation is

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the pendulum of a clock

The wind screen wiper

A plucked sonometer wire

A sonometer wire excited by a tuning fork

A body attached to a spring is pulled to a distance of 20 cm If the value of spring constant is 48 N m-1, the amount of force applied will be.

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4.8 N

9.6 N

96 N

192 N

Which base units would be needed to express the SI unit of potential difference.

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Kg and A only

m , s and A

kg, m, s and A

mg, m and s

Which of the following quantity is zero about the centre of mass of baody.

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Mass

Acceleration

Moment

Angular momentum

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