Question # 1

Work done along a closed path in a gravitational field is:

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Maximum

Minimum

Zero

Unity

The number of "Earth stations" which transmit signals to satellites and receive signals from them are:

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3

24

126

200

The product of force and time is called change in:

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Momentum

Impulse

Force

Both a and b

Watt x second is unit of:

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Force

Work

Power

None of these

The body oscillates due to ______ accelerates and overshoots the rest position due to _____:

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Applied force , inertia

Restoring force, friction

Frictional force, inertia

Restoring force, inertia

In gases, the charge carriers are:

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Electrons

Positive ions

Negative ions

Both A and C

Both A and B

A particle of mass 0.5 g moving along x-axis is located of x₁= 15 m at t₁= 5s and x₂= 33 m at t₂= 13s its average velocity is

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6 m s^-1

2.45 m s^-1

2.25 m s^-1

4.45 m s^-1

Which one of the following is an example of SHM:

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Motion in a plane

Motion in a swing

Motion in a car

None of these

Which of the following forces is responsible for SHM

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Applied force

Restoring force

Fractional force

Elastic force

Max plank received the Nobel Prize in physics for his discovery of energy quanta in

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1900

1906

1912

1918

A vehicle of mass 120 kg is moving with a uniform velocity of 108 km/h. The force required to stop the vehicle in 10s is

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120 x 10.8 N

180 N

720 N

360 N

A cane filled with water is revolved in a vertical circle of radius 4 m and water just not fall down The time period of revolution will be nearly

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1 s

4 s

8 s

10 s

When a meteorite enters into earth atmosphere its energy converts into

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Kinetic energy

Heat energy

Mechanical energy

None of these

In Young s double slit experiment the separation between the slits in halved and the distance between the slits and the screen is doubled the fringe with will

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Be doubled

Be quadrupled

Remain the same

Be halved

The discuss used by athletes has a mass of 1 kg, its weight in newtons is

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9.8 N

80 N

98 N

100 N

The simplest type of rectification known as half wave rectification is obtained by

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Using a transistor

Suppressing the harmonics in A.C. voltage

Suppressing half wave of A.C. supply by using diode

Using a Coolidge

Two masses m₁ and m₂ have equal momentum their kinetic energies are in ratio of

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m₂: m₁

m²1 : m₂²

m₁: m₂

m₂^{2 :}m²1

Work done is a gravitational field along a closed loop is

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Maximum

Minimum

1

Zero

The power loss can also take place due to

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Information received can be inaccurate due to dispersion

Light signal may not be perfectly monochromatic

Signal accuracy may be affected by deflective source

All of these

Iron, cobalt and nickle are examples of

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diamagnetic substances

ferromagnetic substances

paramagnetic substances

all of them

The critical angle for a ray of light suffering total internal reflection will be smallest for the ray traveling from

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Water to glass

Water to air

Glass to air

Glass to water

For a moving body. at any instant of time

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If the body is not moving the acceleration is necessarily zero

If the body is slowing.the retardation is negative

If the body is slowing.the distance is negative

If displacement.velocity and acceleration at that instant are known,we can find the displacement at any given time in future.

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