Question # 1

Solar cells are thin wafers made from

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Uranium

Nickel

Silicon

Cadmium

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

The resultant of two force 3 N and 4 N making an angle 90 ^o with each other is.

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1 N

3 N

5 N

10 N

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

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Rest mass

Gravitational mass

Inertial mass

Weight

Rate of change of momentum is called.

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Torque

Force

Impulse

Inertia

A particle executing simple harmonic oscillations of frequency 100 Hz has an amplitude of 0.1 cm The velocity amplitude of the particleis.

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20 micro cm s-1

10 micro cm s-1

20 cm s-1

19 cm s-1

In simple harmonic motion we have the conservation of.

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K.E.

P.E

Total energy

Electrical energy

A body of mass 2 kg is suspended in a elevator by means of a spring The balance reads its weight when the elevator moves up with an acceleration of 5 m s-2 as.

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9.8 N

29. 6 N

26.5 N

30.5 N

If length of second pendulum becomes four times than its time period will become

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Two times

Four times

Six times

Eight times

When damping is small amplitude of vibrational resonance will be

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small

Large

Infinite

Un changed

the consumption of energy by a 60 watt bulb in 2 s is

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0.02 J

30 J

120 J

60 J

The unit of energy are the same as that of

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Force

Power

Work

Efficiency

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

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

The dimension of momentum is.

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[MLT-1]

[ML2T-2]

[ML3T-2]

[MLT-1]

a 2,000 kg heavy truck travelling at 36 km h-1 strikes a tree and comes to a stope in 0.1 s The average force on the truck during the crash is.

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2 x 10² N

2 X 10³N

2 X 10⁴ N

2 X 10³ N

Which of the following will not acceleation.

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The moon in its orbit

A tennis ball rebounding from ground

A store in free fall

A car in which the engine thrust is equal to the friction

Two simple pendulums of the same length but having different masses

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Have different frequencies

Will have period proportional to their masses

Will have periods independent of their length

Have the same period

The gravitational force between two bodies does not depends upon.

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The product of their masses

Their separation

The sum of their masses

The constant of gravitation

The horizontal distance of a projectile from the point of launch to the point of impacts is called.

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Height of projectile

Range of projectile

Path of projectile

Angle of projectile

The reluctance of a body to start moving is called.

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Mass

Weight

Force

Inertia

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