Question # 1

A wave, which transfer energy by moving away from the source of disturbance is called a

Choose an answer

progressive wave

travelling wave

both of them

none of them

Which force is not a conservative force:

Choose an answer

Frictional force

Gravitational force

Electric force

Elastic spring force

One KWh is equal to:

Choose an answer

3.6 x 10²J

3.6 KJ

3.6 x 10¹KJ

3.6 MJ

The half life of radioactive substances depends upon

Choose an answer

amount of substance

energy of substance

state of substance

temperature of substance

The value of resistivity is the least for:

Choose an answer

Copper

Aluminimum

Silver

Tungsten

Iron

Mechanical waves on the surface of a liquid are

Choose an answer

Transverse

Longitudinal

Torsional

both transverse and longitudinal

The value of escape velocity of Earth planet comes out to be:

Choose an answer

11 m/sec

11 km/sec

11 km/hour

11 cm/sec

A reversible cycle is the one in which

Choose an answer

some of the changes are reversible

all of the changes are reversible

all of the changes are irreversible

none of them

The greatest stress that a material can endure without losing the proportionality between stress and strain is called

Choose an answer

plastic line

breaking point

proportional limit

none of them

The term drift velocity is used when the ends of a wire are:

Choose an answer

Connected to a laser source

Connected to a voltage source

Not connected to a voltage source

At different values of potential

Both (B) and (D)

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

Direction of motion _________ in circular motion

Choose an answer

Changes off and on

Changes continously

Does not change

None of them

A stone is dropped from rest from the top of a tower 19.6 m high. The distance traveled during the last second of its fall is (giving g=9.8 m/s^s)

Choose an answer

9.8 m

14.7 m

4.9 m

19.6 m

An axis of rotation

Choose an answer

Is a straight line

Is normal to the plane of rotation

Passes through pivot point O

All of them

Pair production take place when energy ofγ-rays photon is

Choose an answer

equal to 1.02 Mev-

greater than 1.02 Mev

less than 1.02 Mev

none of these

Which of the following is a state variable

Choose an answer

entropy

pressure

volume

all of them

A typical rocket consists of fuel

Choose an answer

more than 60% of launch mass

less than 60% of launch mass

less than 80% of launch mass

more than 80% of launch mass

Which one of the following waves belongs to electromagnetic spectrum

Choose an answer

Radio and TV waves

Radar waves

Micro waves

All of them

Blood is an

Choose an answer

Compressible fluid

incompressible fluid

hard

none of them

If a charged spherical conductor of radius 10 cm has potential V at a point distance 5 cm from its centre, then the potential at a point distance 15 cm from the centre will be

Choose an answer

1/3 V

2/3 V

3/2 V

3V

The isotope/s of hydrogen is /are:

Choose an answer

Protium

Deuterium

Tritium

Both (A) and (B)

All of these

Time period of simple pendulum is independent of

Choose an answer

length

mass

acceleration due to gravity

none of them

Brownian motion increases due to

Choose an answer

Increase in size of Brownian particle

Increase in temperature of medium

Increase in density of medium

Increase in viscosity of medium

The unit of decay constant is

Choose an answer

sex

sec²

sec^-1

sec^-2

In helium Neon Laser Neon = 15% and Helium = 85% used. The lasing gas this unit is

Choose an answer

Helium

Neon

Both

None of these

Tick the correct statement:

Choose an answer

Both the potential and potential difference is scalars

Potential is a scalar but potential difference is a vector

Both are vectors

Potential is vector but potential difference is scalar

None of these

Every crystalline solid has

Choose an answer

definite melting point

different melting points

may or may not be definite

none of them

Light has:

Choose an answer

Wave nature

Particle nature

Dual nature

None of these

Internal energy is the sum of all the forms of

Choose an answer

K.E

P.E

both of them

none of them

Pressure may be define as _______ per second per unit area:

Choose an answer

Change in force

Change in momentum

Change in energy

Work done

When the particles of the medium vibrate about their mean position, along the direction of the motion of waves, then the waves are called:

Choose an answer

Longitudinal waves

Transverse waves

Water waves

Complex waves

More Classes

Other Links

ECAT Pre General Science 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