Question # 1

Pair production is the phenomenon in which

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matter is converted into energy

energy is converted into matter

light is converted into electrical energy

electrical energy is converted into light

The current of 1 ampere is passing through a conductor. The charge passing through it in half a minute is:

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One coulomb

0.5 coulomb

30 coulomb

2 coulombs

None of these

Electrostatics is the branch of physics which deals with the study of electro charges:

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At rest

At rest under the action of electric forces

In motion under the action of electric forces

In motion

At rest under the action of nuclear forces

Change in momentum is one second called.

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Impulse

Force

Energy

Work

The induced current is a conductor depends upon:

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Resistance of the loop

Speed with which the conductor moves

Any of these

Both (A) and (B)

None of these

Which is modified form of galvanometer

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potentiometer

battery

voltmeter

slide wire bridge

Area under the force displacement graph gives

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Power

Work

Heat

Energy

The materials in which there are plenty of free electrons for electrical conduction are known as

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conductors

insulators

semi-conductors

all of them

transverse wave motion is possible in:

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Air

A mixture of NH₃and O₂

Strings

All of these

The holes created in the L and M shells are occupied by transitions of:

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Electrons from lower states

Electrons from higher state

Positrons from higher states

Electrons from K shell

Both (A) and (B)

Which of the following does not have the same units:

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Work

Heat

Kinetic energy

Power

Work is a

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Scalar quantity

Vector quantity

Base quantity

None of these

Marie curie and Pierre curie discovered:

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Uranium

Polonium

Radium

Both (A) and (C)

Plutonium

Neutron was disvovered by:

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Rutherford in 1920

Chadwick in 1922

Bohr in 1913

Compton in 1927

None of these

The special theory of relatively treats the problems involving:

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Inertial frames of reference

Non-inertial frames

Non-accelerated frame

Botha (A) and (C)

Both (B) and (C)

The relation V = IR represents

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Ampere law

Faraday's law

Ohm's law

Len's law

Due to relative motion of observer and the frame of reference of events, time always:

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Dilates itself

Contracts itself

Stretches itself

Both (A) and (C)

None of these

Field lines are closer to each other in the region where the filed is

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Stronger

Weaker

Much weaker

Absent

None of these

Which of the following options states the names of fluids in the order of increasing viscosity?

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mercury, motor oil, methanol

methanol, mercury, motor oil

motor oil, mercury, methanol

methanol, motor oil, mercury

If a vector lies in second quadrant, than B_xand B_yare:

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-,+

+,-

+,+

-,-

Nuclei that have the same charge number but different mass number are called

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isotones

isomers

isotopes

isobars

Peak value of alternative current is:

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one of its Instantaneous value

Equal to its RMS value

The same as its peak-to-peak value

Both (B) and (C)

None of these

Moment of linear momentum is called.

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Moment arm

Moment of inertia

Inertia

Angular momentum

During the positive half-cycle in the half-wave rectification,the diode

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does not conduct

conducts

either of these

neither of these

In case of an ideal gas, the P.E associated with its molecule is

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maximum

zero

minimum

not fixed

The unit of decay constant is

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sex

sec²

sec^-1

sec^-2

When half of the cycle of a body executing S.H.M is completed, then the phase of the vibration will be

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45°

90°

135°

180°

The internal pressure of the blood is

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less than the external atmospheric pressure

greater than the external atmospheric pressure

equal to the external atmosphericpressure

none of them

In case of point, source of light shape of wavefront is:

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Spherical

Cylindrical

Plane

None of these

Smaller the damping, the resonance will be

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more flat

more sharp

both of them

none of them

When brakes are applied to a fast moving car, the passenger will be thrown:

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Forward

Backward

Downward

none of these

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