Question # 1

When quarter of a circle is completed, the phase of vibration is:

Choose an answer

90°

180°

45°

360°

Huygen principle is used to determine:

Choose an answer

Speed of light

Location of wavefront

About polarized or unpolarized light

None of them

At higher frequency of the alternating current, the capacitive reactance X_c

Choose an answer

Increases

Decreases

Remains the same

Increases only when the voltage increases

Electrons are

Choose an answer

positive charged

negatively charged

massless

neutral

The net force acting on a 100 kg man standing in an elevator accelerating downward with a = 9.8 m sec^-2comes out to be

Choose an answer

980 N

580 N

1380 N

Zero

Which one is not produced by sound waves in air?

Choose an answer

Polarization

Diffraction

Refraction

Reflection

An isochoric process is one which take place at

Choose an answer

Constant internal energy

Constant entropy

Constant volume

Constant pressure

The pattern of crystalline solid is:

Choose an answer

One dimesional

Two dimensional

Three dimensional

Either (A) or (B)

None of these

The value of relative permittivity of different dielectrics are:

Choose an answer

Equal

Different

Greater than one

Smaller than one

Both (B) and (C)

For a n-p-n transistor, the conventional current equation can be written as

Choose an answer

I_E+ I_C= I_B

I_C- I_B= I_E

I_C+ I_B= I_E

I_B+ I_E= I_C

Micheal Faraday and joseph Henry belong respectively to:

Choose an answer

USA and England

England and France

England and USA

USA and France

None of these

The smallest three dimensional basic structure is called as:

Choose an answer

An atom

Unit cell

Crystal lattice

Polymer

None of these

Longitudinal waves are also called:

Choose an answer

Congressional waves

Transverse waves

Radio waves

None of them

The electric field intensity at a point due to a point charge

Choose an answer

Falls off inversely as the distance

Falls off inversely as the square of distance

Remains unchanged with distance

Increase directly as square of distance

The concept of entropy was introduced into the study of thermodynamics in

Choose an answer

1856

1865

1656

1685

A body with frequency of would complete one vibration in:

Choose an answer

f seconds

1/f seconds

1 second

f²second

A rocket carries its own fuel in the form of

Choose an answer

liquid only

liquid or solid

liquid and solid

liquid or solid and oxygen

Frequency of red color as compared to that of violet color is:

Choose an answer

Equal

Smaller

Greater

None of these

When the atomic particle are moving with velocities approaching that of light:

Choose an answer

Newton's laws become valid

Relativistic effects become prominent

Botha(A) and (B) are valid

Neither (A)nor (B)

There mass becomes zero.

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

Choose an answer

range ofγ-particle

range of neutrons

range of particle

none of these

Which of the following is the longitudinal waves?

Choose an answer

Sound waves

Waves on plucked string

Water waves

Light waves

The Nobel Prize on the explanation of photoelectric effect was awarded to:

Choose an answer

Max. Planck

Maxwell

Bohr

Rutherford

None of these

A square loop of wire is moving through a uniform magnetic field. The normal to the loop is oriented parallel to the magnetic field. The emf induced in the loop is:

Choose an answer

Zero

Of smaller magnitude

Of larger magnitude

Sometimes B, sometimes C

Neither of these

Hotness and coldness of an object is represented in terms:

Choose an answer

Heat

Temperature

Chemical energy

None of these

The power of an electric generating station is expressed in:

Choose an answer

Kilo Jule

Kilowatt-hour

Kilo watt

Watt

Electron is a particle whose mass is:

Choose an answer

Greater than that of a proton

Smaller than of a proton and greater than mass of neutron

Smaller than that of proton or neutron

Greater than that of an atom

If rope of lift breaks suddenly. The tension exerted by the surface of lift is (a=Acceleration of lift)

Choose an answer

mg

m (g+a)

m (g - a)

0

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

Choose an answer

60°

45°

30°

90°

Mass of proton is

Choose an answer

1.67 x 10^-27kg

1.67 x 10^-31kg

1.66 x 10^-34kg

1.67 x 10^-17kg

The electrical forces between the molecules of a liquid are

Choose an answer

Repulsive

Attractive

Both A and B

None

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

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