Question # 1

When a body is lifted through height h, the work done on it appears in the form of its

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Kinetic energy

Potential eneger

Elastic potential energy

Geothermal energy

Which pair of physical quantities has same SI unit?

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energy , power

power , work

energy , work

work , momentum

In Fahrenheit scale, upper refrence point is:

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32 ^oF

212 ^oF

180 ^oF

100 ^oF

The base quantity is.

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Volume

Torque

Mass

Momentum

There are ways to transfer the heat from one place to another.

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1

2

3

4

The velocity of freely falling bbodies moving upward.

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Decreases

Increases

Constnat

zero

Motion of the rocket is the example of which law?

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First law

Second law

Third law

Law of momentum

In Einstin's mass energy equation, c is the :

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Speed of sound

Speed of light

Speed if volume

None of these

Boiling point of water is:

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0 ^oC

100^oC

212^oC

180^oC

The slope of distance time graph shows.

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Speed

Displacement

Acceleration

Distance

Forces on doubled arm spanner are called.

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Torque

Couple

Moment of force

Momentum arm

Which form of energy is sound?

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Electrical

Mechanical

Thermal

Chemical

Which is an example of a longitudinal wave:

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Sound wave

Light wave

Radio wave

Water wave

The distance between principal focus and pole of mirror is called:

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Princpal focus

Focal length

P

Image

If we double both the current and the voltage in a circuit while keeping its resistance constant, the power.

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remains unchanged

halves

doubles

four time

The digits used in electronics are:

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1

0

0 and 1

1 and 2

In fixed capacitor dielectric used is:

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Paper

Metal

Mica

Paper & mica

The equivalent resistance of a parallel combination is:

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Equal to sum of all resistance

Is greater than the largest resistance of combination

Is smaller than the smallest resistance of combination

All of these

Two switches attached in series work on which operation?

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AND operation

OR operation

NOT operation

NOR operation

A transformer has Np =100 and Ns =500 , if 6 volt D.C is applied across its primary, the induced voltage.

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0 V

30 V

45 V

60 V

The combined resistance of two identical resistors, connected in series is 8Ω. Their combined resistance in a parallel arrangement will be:

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2Ω

4Ω

8Ω

12Ω

What is the direction of the magnetic field lines inside a bar magnet?

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From north pole to south pole

From south pole to north pole

From side to side

There are no magnetic field lines.

Work is a

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Scalar quantity

Vector quantity

Basic quantity

None of these

The measure of hotness or coldness of a substance is.

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Temperature

Heat

Internal energy

Energy

If heat is added to a system, then its entropy will.

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Increases and positive

Decrease and positive

Increases but negative

Decreases but negative

Boltzman constant 'k' has same unit as.

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Temperature

Energy

Entropy

Pressure

The ability of reveal the minor details of an object under examination is called.

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Resolving power

Magnification

Scattering

Reflection

A ball is thrown up with 20 ms-1 at an angle of 60 ^owith x-axis , the velocity of the ball at the top position is.

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0 ms-1

10 ms-1

20 ms-1

16 ms-1

Maximum number of components of a vector may be

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Infinite

One

two

three

Moment of inertia is measure din

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Kg m2

Kg m-2

Rad s-1

Joule second

When a particle is moving along a circular path its projection along the diameter executes

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Linear motion

Vibratory motion

Rotatory motion

SHM

The weight of an object an elevator moving down with an acceleration of 9.8 m/s2 will becomes

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Half

Double

Unchanged

Zero

Speed of sound in aluminum at 20 ^oC is.

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3600 m/s

5100 m/s

5130 m/s

3500 m/s

In glass, molecules are irregularly arranged so it is known as.

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Solid

Liquid

Solid liquid

Gas

Donor impurities are

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Germanium, silicon

Indium, galium

Antimony, arsenic

Diamond, carbon

If 10 A current passes through 100 mH inductor, then energy stored is.

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100 J

5 J

20 J

Zero

When a coil is moved in a uniform magnetic field, an induced emf is produced due of change in

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Flux density

Electric flux

Magnetic flux

Magnetic field strength

The photoelectric effect predicts that light is made of

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Photons

Neutrons

Protons

None of these

In frequency modulation which factor changed.

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Amplitude of charge carriers

Frequency of charge carriers

Amplitude of signal

Frequency of signal

The word amorphous means:

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Regular structured

Without form or structure

Frozen structured

None of above

When an electron in an atom goes from a lower to higher orbit its:

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K.E increases , P.E decreases

K.E increases , P.E increases

K.E decreases , P.E increases

K.E decreases , P.E decreases

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Lenz's law

Faraday's law

Ampere's law

None of these

The first atomic reactor was introduced by

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Currie

Enrico Fermi

Newton

Bohr

Mass equivalent of 931 MeV energy is:

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6.02 x 10^-23 kg

1.766 x 10^-27kg

2.67 x 10^-29kg

6.02 x 10^-87kg