Question # 1

If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by

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-4

4

2

1

The speed of randomly moving electrons depends upon

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pressure

volume

temperature

mass

A force of 5 n is acting Y-axis. Its component along X-axis is:

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7 N

5 N

Zero

10 N

The S.I unit of frequency is

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Vibrations s^-2

Ms^-1

Hertz

s^-1

A lift is descending at a constant speed V. A passenger in the lift drops a coin. The acceleration of the coin towards the floor will be

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Zero

g

-g

V + g

The Stephen-Boltzmann law for the black body radiation is given by

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E = T²

E = -T²

E = T⁴

E = -T⁴

Adiabatic change occurs when the gas

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expands

compressed

expands or compressed

expands or compressed rapidly

The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains

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3 more neutrons

3 more electrons

3 more protons

3 more ions

Which quantity has the same dimension as that of impulse?

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KE

Power

Momentum

Work

When the charged particle is projected at right angles to the field, then experienced by it will be:

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Maximum

Zero

qvB

Both (A) and (B)

Both (A) and (C)

The mass of the object is a quantities measure of its

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speed

velocity

acceleration

inertia

During each cycle, alternating voltage reaches a peak value

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One time

Two times

Four times

A number of times depending on the frequency

The magnitude of induced emf depends upon the:

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Rate of decrease of magnetic field

Rate of change of magnetic field

Rate of increase of magnetic flux

Constancy of magnetic field

None of these

Under the elastic region, the deformation produced in the material, the deformation produced in the material will be

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permanent

temporary

either of them

none of them

In flesh, light element like carbon, hydrogen and oxygen predominate. Three elements allows ______ amount of incident X-ray to pass through them

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Small

Greater

Equal

Sometimes

.Depletion region contains:

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Protons

Positive ions

Negative ions

Both (B) and (C)

Both (A) and (C)

When current passes through a solenoid coil, it behaves like a

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loop

circle

bar magnet

none of these

A high concentration of red blood cells increases its viscosity from

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3 - 5 times that of mercury

5 - 8 times that of mercury

3 - 5 times that of water

5 - 8 times that of water

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 dimension of linear inertia is:

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MLT²

ML⁰T^-2

ML⁰T⁰

MLT^-1

Ball pen functions on the principle of

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Viscosity

Boyle's law

Gravitational force

Surface tnesion

The work done in moving a body between two points in a conservative field is independent of the

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Direction

Force applied

Path followed by the body

Power

When platinum wire is heated, it appears cherry red at

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1600°C

900°C

1100°C

1300°C

If a material object moves with the speed of light 'C' its mass becomes

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Equal to its rest mass

Four times of its rest mass

Double of its rest mass

Infinite

Xerography means:

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Dry writing

Wet writing

Poor writing

Excellent writing

Both (A) and (B)

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

There is no net transfer of energy by particle of medium in

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Longitudinal wave

Transverse wave

Progressive wave

Stationary wave

The electrical forces between the molecules of a liquid are

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Repulsive

Attractive

Both A and B

None

Electron volt is the unit of.

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Potential difference

Energy

Resistance

Capacitance

Angular momentum

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Scalar

Axial vector

Polar vector

At 45° angle

Efficiency of carnot engine is independent of the

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temperature of sink

temperature of source

nature of the working substances

none of them

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