Question # 1

In compressional wave,the layer of medium having reduced pressure is called:

Choose an answer

Compression

Elasticity

Node

Rarefaction

Experiments revealed that the ratio of the stress to the strain is a constant value for

Choose an answer

different material

all materials

a given material

all of them

When a stress changes the shape, it is called the

Choose an answer

compressional stress

tensile stress

shear stress

any one of them

Chock consumes externally small

Choose an answer

Charge

Current

Power

Potential

Ultra-violet rays differ from X-rays in that they

Choose an answer

Cannot be diffracted

Cannot be polarized

Have a lower frequency

Are deviated when they pass through a magnetic field

An object thrown in arbitrary direction in space with an initial velocity and moving freely under gravity will follow

Choose an answer

a circular path

a straight line

a hyperbola

a parabola

On a cold morning a metal surface will fell colder to touch than a wooden surface, because

Choose an answer

Metal has high specific heat

Metal has high thermal conductivity

Metal has low specific heat

Metal has low thermal conductivity

The ohm's is defined as

Choose an answer

1 ampere / 1 volts

1 coulomb / 1 volt

1 volt / 1 ampere

1 volt / 1 coulomb

According to the de-Brogile relation, an object of large mass and ordinary speed has

Choose an answer

very small wavelength

very large wavelength

very small frequency

all of these

Cause of heat production in a current carrying conductor is

Choose an answer

Collisions of free electrons with one another

High drift speed of free electrons

Collisions of free electrons with atoms or ions of conductor

High resistance value

Sound waves in air always

Choose an answer

Longitudinal

Transverse

Stationary

Electromagnetic

The magnitude of the force producing an acceleration of 10 m/sec²in a body of mass 500 grams is:

Choose an answer

3 N

4 N

5 N

6 N

When transistors are used in digital circuits they usually operate in the

Choose an answer

Active region

Breakdown region

Saturation and cutoff regions

Linear region

The value of the input resistance of OP-AMP is of the order of

Choose an answer

few ohms

few hundred ohms

several kilo ohms

several maga ohms

Compton was awarded Nobel prize in physics in

Choose an answer

1921

1923

1925

1927

Radiation detector are used to

Choose an answer

measure intensity of radiation

measure energy of radiation

difference between different types of radiation

all the above

γ-rays are

Choose an answer

electrostatic waves

electromagnetic waves

heavy particles

longitudinal waves

Acceleration of a body is positive, if the velocity of the body is

Choose an answer

constant

increasing

decreasing

none of them

A train of 150 m length is going towards north direction at a speed of 10 ms^-1. A parrot files at a speed of 5 ms^-1towards south direction parallel to the railway track. The time taken by the parrot to cross the train is equal to

Choose an answer

12 s

8 s

15 s

10 s

The velocity of a body at any instant of its motion is known as

Choose an answer

average velocity

instantaneous velocity

uniform velocity

none of them

The ratio of velocity of sound in air at 4 atm pressure and that at 1 atm pressure would be

Choose an answer

1 : 2

4 : 1

1 : 4

2 : 1

The length of rotating vector (on a certain scale) represents the:

Choose an answer

Peak value of alternating quantity

RMS value of alternating quantity

Instantaneous value of alternating quantity

Either (B) or (C)

Either (A) or (B)

The path followed by the projectile is known as:

Choose an answer

Cycle

Hyperbola

Trajectory

Route

At high altitude the blood oozes out of the nose and ear because

Choose an answer

The blood pressure increase at high altitudes

The percentage of oxygen in the air increase

The atmospheric pressure decrease there

The density of blood decrease at high altitudes

An atom in which there is a resultant magnetic field, behaves like a tiny magnet and is called as

Choose an answer

magnetic

magnetic dipole

magnetic monopole

none of them

The bands below the valence band are

Choose an answer

completely filled and play active part in conduction process

completely filled and plays no part in conduction process

completely filled and play active part in conduction process

not completely filled and play no part in conduction process

The force experienced by a single charge carrier moving with velocity 'v' i magnetic field of strength 'B' is given by

Choose an answer

F =q(v/B)

F=q²(v x B)

F=q(v x B)

F= vx B

High speed meteors rushing through air reduces to ashes because of:

Choose an answer

Force of gravity

High resistance of air

Drag force

None of these

The natural frequency of a pendulum which is vibrating freely, depends upon its

Choose an answer

mass

length

material

all of them

While deriving equation of pressure by kinetic theory of gases, we take into account:

Choose an answer

Only linear motion of molecules

Only rotational motion

Only vibratory motion

All of these

The induced current in a conductor depends upon

Choose an answer

Resistance of the loop

Speed with which the conductor moves

Any of these

Both A and B

None of these

More Classes

Other Links

ECAT Physics Online Test MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer