Question # 1

A body is executing free vibrations when it oscilates

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with the interference of an external force

without the interference of an external force

with the interference of an internal force

none of them

The least distance of distinct vision is:

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10 cm

25 cm

50 cm

100 cm

Silicon can be obtained from:

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Lead

Uranium

An isotope of oxygen

Sand

Compton was awarded Nobel prize in physics in

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1921

1923

1925

1927

If work is done at the rate of 2 k j per second, then total work done is half an hour will be:

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0.5 Kwn

2 Kwh

1 Kwh

None of these

The work done by a force, keeping an object in circular motion with constant speed is:

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Zero J

1 J

0.1 J

0.01 J

A mass spectrograph sort out

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molecules

atoms

elements

isotopes

The unit of flux density is also given by

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Weber/m²or Wb . m^-2

Weber/mor Wb . m

Weber/mor Wb . m^-1

Weber or Wb

Rocket engines lift a rocket from the earth surface, because hot gas with high velocity

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Push against the air

React against the rocket and push it up

Heat up the air which lifts the rocket

Push against the earth

A digital system deals with quantities or variables which have

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only one state

only two discrete states

three discrete states

four discrete states

In a normal healthy person the value of diastolic pressure is

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75 - 80 torr

100 torr

120 torr

none of them

In digital modulation, the LED or laser flashed on and off at a

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Fast rate

Very fast rate

Extremely fast rate

None of these

SI Unit of power is

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Joule

Pound

Watt

Dyne

The state of rest and state of motion are

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Irrelevant

Relative

Both

None of these

The K.E.of a light and a heavy object is same.Which object has maximum momentum?

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Light object

Heavy object

Both have the same momentum

Data is not sufficient

In the hysteresis loop, when the current is reduced to zero, the material

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does not retain magnetism

retains not retain magnetism

retains strong magnetism

none of them

A couple produces

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Purely linear motion

Purely rotational motion

Linear and rotational motion

No motion

A one microfarad capacitor of a TV is subjected to 4000 V potential difference The energy stored in capacitor is

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8 J

16 J

4 x 10^-3 J

2 x 10^-3 J

One micron is equivalent to

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10^-4m

10^-6m

10⁴m

10⁶m

The force which aries when one layers of liquid slides over another layer is measure by

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Viscosity

Velocity

Momentum

Acceleration

When two semiconductors of p- and n-type are brought into contact, they from a p-n junction which act like a:

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Conductor

Amplifier

Oscillator

Rectifier

The source in the heat engine is at

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Low temperature

High temperature

Zero temperature

None of these

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