Question # 1

At absolute temperature, the kinetic energy of the molecules

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Becomes zero

Becomes maximum

Becomes minimum

Remain constant

magnetic field is a:

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Vector quantity

Scalar quantity

Scalar as well as scalar quantity

Any of (A) or (B)

Neither (A) nor (B)

A solar cell converts energy of the Sun into:

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Heat energy

Magnetic energy

Light energy

Sound energy

A body with frequency would complete one vibration in:

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f seconds

1/f seconds

1 second

f²second

Consider a photon of continuous X-ray and a photon of characteristics X-ray of same wavelength. Which of the following is/are different for the two photons

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Frequency

Penetrating power

Energy

Method of creation

A body is floating in a liquid. The up thrust on the body is

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Equal to weight of liquid displaced

Zero

Less than the weight of liquid displaced

Weight of body-weight of liquid displaced

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

Two point charge +3μC and +8μC repel each other with a force of 40 N. If a charge of -5μC is added to each of them, then the force between then will become

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-10 N

+10 N

+20 N

-20 N

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

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

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Maximum

Minimum

Zero

Unity

In the reverse process, the working substance passes through the same stages as in the direct process and

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thermal effects at each stage are exactly reversed

mechanical effects at each stage are exactly reversed

thermal and mechanical effects at each stage remain the same

thermal and mechanical effects at each stage are exactly reversed

Gauss(G) is smaller unit of magnetic induction which is related to tesla(T) as

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IT = 10^-4G

IT = 10⁵G

IT = 10³G

IT = 10⁴G

The distance travelled byα-particle in a medium before coming to rest, is called

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range ofγ-particle

range of neutrons

range of particle

none of these

In a transistor, if the central region is n-type, then this type of transistor is known as

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n-p-n transistor

p-n-p transistor

either of these

none of these

On heating, glass gradually softens into a paste like before it becomes a very viscous liquid at almost

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600°C

7600°C

800°C

900°C

The vibratory or oscillatory motion of a body is

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translatory motion

back and forth motion about its mean position

free all motion

circular motion

In the text book, the transistor amplifier circuit is a:

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Common emitter circuit

Common collector circuit

Common base circuit

Any of these

None of these

Which of the following is an example of SHM(in ideal situations)

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Motion of simple pendulum

Motion of horizontal spring man system

Motion of violin string

All of these

The quantity having dimension of ML²T⁰²will earth is:

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80 sec

500 sec

1.802 X 10⁴sec

Aerophysics

In a coil current change from 2 to 4 A in .05 s. If the average induced emf is 8V then coefficient of self-inductance is:

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0.2 henry

0.1 henry

0.8 henry

0.04 henry

The space around the earth in which its gravitational force acts on a body is called

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Electric Field

Gravitational field

Magnetic field

Conservative field

Flurescent screen is a screen where visible spot

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vanishes

is made

becomes small and large

none of these

When the temperature of source and sink of a heat engine become equal entropy change will be

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Zero

Max

Min

-ve

Different radioactive material have

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same half lives

different half lives

same mean lives

same total lives

Position was discovered by Carl Anderson in

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1920

1925

1928

1932

When a constant potential difference is applied across the conductor, the drift velocity of electrons:

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Increases

Decreases

Remains the constant

Either of these

None of these

For the normal operation of the transistor, its

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emitter-base and collector base junctions are forward biased

emitter-base junction is reversed biased and collector base junction is forward biased

emitter-base junction is forward biased and collector-base junction is reverse biased

any one of these

If the displacement of a body executing S.H.M is plotted against time, then the curve is known as

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frequency of S.H.M

period of S.H.M

wave form

none of them

Work is a:

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Scalar quantity

Vector quantity

Base quantity

None of these

When some compass needles are placed on a card board along a circle with the center at the wire, they will

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Point the direction of N-S

Set themselves tangential to the circle

Point in the direction of E-W

None of these

Point in direction of S-E

The volume of universal gas constant R is:

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8.314 J/K mole K

8314 J/K mole K

8.314 J/mole K

None of these

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