Question # 1

Static electricity is produced by the transfer of:

Choose an answer

Electrons

Protons

One fluid

Two fluids

None of these

When two protons are brought closer potential energy of both of them:

Choose an answer

Increases

Decreases

Remains same

None of these

The thermistors are usually made of

Choose an answer

Metals with low temperature coefficient of resistivity

Metals with high temperature coefficient of resistivity

Metal oxides with high temperature coefficient of resistivity

Semi conducting materials having low temperature coefficient of resistivity

According to the Bernoulli's theorem the pressure velocity are

Choose an answer

equal to each other

proportional to each other

inversely proportional to each other

none of them

During the whole carnot cycle

Choose an answer

Thermal equilibrium is maintained

mechanical equilibrium is maintained

both the thermal and mechanical equilibriumis maintained

both the thermal and mechanical equilibrium is not maintained

The ability of the body to return to its original shape is called

Choose an answer

deformation

stretching

compressing

elasticity

A photon is considered to have

Choose an answer

Momentum

Energy

Wavelength

All of the above

Dimensions of velocity are

Choose an answer

[L]

[T]

[LT^-1]

[LT^-2]

Any superconductor with critical temperature above 77 K, is referred as

Choose an answer

low temperature superconductor

high temperature superconductor

very low temperature superconductor

none of them

Michael Faraday is known by his work on

Choose an answer

Nuclear strong force

Gravitational force

Nuclear weak force

Electric force

None of these

The special theory of relatively treats the problems involving:

Choose an answer

Inertial frames of reference

Non-inertial frames

Non-accelerated frame

Botha (A) and (C)

Both (B) and (C)

One coulomb of charge is created by

Choose an answer

10 electrons

1.6 x 10^-19electrons

6.25 x 10¹⁸electrons

6.25 x 10²¹electrons

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

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

Choose an answer

Max. Planck

Maxwell

Bohr

Rutherford

None of these

During the positive half-cycle in the half-wave rectification,the diode

Choose an answer

does not conduct

conducts

either of these

neither of these

If m is the mass of the gases ejected per second with velocity v relative to the rocket of mass M, then the acceleration of rocket is

Choose an answer

a = M/mv

a = mM/v

a = mv/M

a = v/mm

The smallest three dimensional basic structure is called as:

Choose an answer

An atom

Unit cell

Crystal lattice

Polymer

None of these

A body falls freely from rest. It covers as much distance in the last second of its motion as covered in the first three seconds. The body has fallen for a time of

Choose an answer

3 s

5 s

7 s

9 s

Rice takes longest to cook

Choose an answer

In a submarine 100 m below the surface of the sea

At sea level

At Murree

At Mount Everest

The efficiency of petrol engine is usually not more than 25% to 30% because of

Choose an answer

friction

heat losses

both of them

none of them

Charge to mass ratio (e/m) of an electron is given by the relation

Choose an answer

e/m = 2V/Br²

e/m = 2V/B²r

e/m = 2V/B²r²

e/m = V/2B²r²

Electromagnetic waves emitted by hot bodies are called:

Choose an answer

Photoelectrons

Alpha rays

Thermal radiation

None of these

Suppose the water flows out from a pipe at 3kg s^-1and its velocity changes from 5m s^-1to zero on striking the wall, then the force exerted by water on wall will be

Choose an answer

5 N

10 N

15 N

20 N

The SI unit of electric field intensity is

Choose an answer

CN^-1

NC^-1or Vm^-1

JC^-1

AV^-1

Wave disturbances may also come in a concentrated bundle, like shock wave from an aeroplane flying at

Choose an answer

subsonic speed

sonic speed

super sonic speed

any one of them

When brakes are applied to a fast moving car, the passengers will be thrown:

Choose an answer

Forward

Backward

Downward

None of these

The range ofβ-particle in air is greater than that ofα-particle by

Choose an answer

1000 times

100 times

15 times

10 times

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

Bodies failing freely under gravity provide good example of motion under

Choose an answer

non-uniform acceleration

uniform acceleration

variable acceleration

increasing acceleration

An inkjet printer uses in its operation:

Choose an answer

Neutrons only

Mesons only

Positrons and photons

An electric charge

None of these

U-238 present in the natural uranium is about:

Choose an answer

59%

0.007%

99%

39%

19%

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