Question # 1

Phenomenon of radioactivity is due to disintegration of

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nucleus

neutron

proton

molecule

The study of physics involves?

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Structure of space and time

Interaction of electromagnetic radiation with matter

Both of them

Chemical changes

None of them

Velocity of sound in a diatomic as is 300 m/sec. what is its rms velocity?

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400 m/sec

40 m/sec

430 m/sec

300 m/sec

Which of the following quantity for particle executing SHM is non-zero at mean position

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Force

Acceleration

Velocity

Displacement

In case of planets, the necessary acceleration is provided by:

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Gravitational force

Coulomb force

Frictional force

None of these

When an object moves with a uniform angular velocity, then its instantaneous angular velocity is equal to:

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Zero

Its average velocity

Its angular displacement

None of these

Inverter is the name given to:

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NOT gate

OR gate

NOR gate

AND gate

XOR gate

The instrument used to gather information form the far side of the universe is

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Compound microscope

Radio telescope

Astronomical Telescope

Simple microscope

Tick the one which is not polymer solid:

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Zirconia

Polythene

Nylon

Synthetic rubber

None of these

The r.m.s. value of alternating current is equal to its maximum value at angle of

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60°

45°

30°

90°

One joule is equal to

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1.6 x 10¹⁹eV

6.25 x 10¹⁸eV

1.6 x 18¹⁸eV

6.25 x 10¹⁹eV

Which of the following is not a projectile

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a bullet fired from a gun

a space ship

a football in air

an artillery shell

The value of the plank's constant 'h' is given by

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1.6 x 10^-19J

1.67 x 10^-27Kg

6.63 x 10³⁴Js

6.63 x 10^-34Js

Which of the following four statements is false?

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A body can have zero velocity and still be accelerated

A body can have a constant velocity and still have a varying speed

A body can have a constant speed and still have a varying velocity

The direction of the velocity of a body can change when its acceleration is constant

A weakly damped system has fairly

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sharp resonance curve

flat resonance curve

both of them

none of them

Since the absolute scale is independent of the property of the working substance, hence, can be applied at

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very high temperature

very low temperature

any one of them

none of them

The blood pressure of a person

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decrease with age

increase with age

has no effect with age

none of them

When we consider the average velocity of a body, then the body is moving in

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straight line

curved path

may be in a straight or curved path

none of them

The energy stored int he water of the dam is:

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Electric energy

Kinetic energy

Potential energy

None of these

The net force acting on a 100 kg man standing in an elevator accelerating downward with a = 0.8 m sec^-2comes out to:

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980 N

580 N

1380 N

Zero

The force acting on a charge moving in a magnetic field

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is perpendicular to the both magnetic field and direction of motion

is proportional to the magnetic of charges

vanishes when the motion is directly opposite to the direction of field

all of the above

Example of vibratory motion is

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mass suspended from a spring

a bob of simple pendulum

mass attached to a spring placed

all of them

The product of induced current and the resistance of the wire through which the current is passing is called:

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Electromagnetic induction

induced emf

Induced current

Self induced

None of these

Faraday's law of electromagnetic induction has been used in the construction of:

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Galvanometer

Voltmeter

Electric motor

Electric genrator

Commutator

The sum of positive and negative peak values is called:

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Instantaneous value

Peak value

Rms valuie

Peak-to peak-value

None of these

Structure of the nucleus was explained by

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J.J Thomson

Bohr

Millikan

Rutherford

Hydrogen atom with only one proton in its nucleus, and one electron in its orbit is called

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deuteron

deterium

protium

tritium

Which of the following has the greatest coefficient of viscosity?

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water

gasoline

honey

tar

Uncertainty is of following type/types:

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Absolute

Fractional

Percentage

All of these

With the increase of temperature viscosity

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Increase

Decrease

Remains same

Doubles

With the help of 50 K v electron microscope, a resolution of

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0.5 to 1 m to possible

1 m to 10 m is possible

0.5 to 1 nm is possible

1 to 10 nm is possible

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