Question # 1

When a transistor is used as a switch the circuit in which the current is to be switched OFF and ON, is connected between the

Choose an answer

base and emitter

collector and emitter

base and collector

any one of these

1 J = ________?

Choose an answer

10⁷erges

10^-7erges

10⁵erges

10^-5erges

If the two charges in Coulomb's law have double distance between them, then electric force

Choose an answer

Becomes two-fold

Becomes four-fold

Remains the same

None of these

The magnetic field inside a solenoid can be increased by:

Choose an answer

Increasing n

Decreasing I

Increasing I

By using iron core within solenoid

All correct except (B)

For inducting emf in a coil the basic requirement is that:

Choose an answer

Flux should link the coil

Change in flux should link the coil

Coil should form a closed loop

Both B and C are true

Resolving power in mth order diffraction for grating is given by:

Choose an answer

R = N/m

R = m/N

R = N x m

None of these

the symbol to be used in relativity problems denotes:

Choose an answer

Dilated time

Proper time

Life time

Half time

None of these

At 'resonance' the transfer of energy from deriving source to the oscillator is

Choose an answer

maximum

minimum

zero

none of them

The force which opposes the applied force producing the displacement in the spring is called

Choose an answer

restoring force

periodic force

centripetal force

resistive force

U-238 present in the natural uranium is about:

Choose an answer

59%

0.007%

99%

39%

19%

Viscosity of water is ______ that of air but ___ that of plasma.

Choose an answer

More, more

Less, more

Less, less

More, less

We can express the work in term of

Choose an answer

directly measurable variables

indirectly measurable variables

either of them

both of them

Efficiency of carnot engine is independent of the

Choose an answer

temperature of sink

temperature of source

nature of the working substances

none of them

Which one of the least multiple:

Choose an answer

Pico

Femto

Nano

Atto

X-ray are also known as

Choose an answer

Roentgen rays

Maxwell rays

Plank range

Einstein rays

Substances which break just after the elastic limit is reached, are known as

Choose an answer

brittle substances

ductile substances

plastic substances

elastic substances

The direction of the linear momentum is the direction of

Choose an answer

speed

velocity

weight

none of them

If a ball comes back to its starting point after bouncing off the wall several times, then its

Choose an answer

total displacement is zero

average velocity is zero

none of them

both of them

A physical system under going forced vibrations is known as

Choose an answer

Simple harmonic oscillator

Compound harmonic oscillator

Physical harmonic oscillator

driven harmonic oscillator

A body is moving with constant velocity of 10 m/sec in the north east direction. Then its acceleration will be:

Choose an answer

10 m/sec2

20 m/sec2

30 m/sec2

Zero

The number of vibrating body at any instant from its equilibrium position is called

Choose an answer

displacement

frequency

amplitude

time period

The mass of fluid passing through any cross-section per unit time is called

Choose an answer

electric flux

magnetic flux

mass flux

none of them

Which one of the following waves belongs to electromagnetic spectrum

Choose an answer

Radio and TV waves

Radar waves

Micro waves

All of them

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

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

The fluid which is incompressible and non viscous is called

Choose an answer

Ideal fluid

Non-ideal fluid

Prefect fluid

All

Good absorbers of heat are

Choose an answer

Poor emitters

Non emitters

Good emitters

Highly polarized

Maximum work is done when force and displacement are

Choose an answer

Parallel

Antiparallel

Perpendicular

Both a and b

When a body is vibrating, the displacement from mean position:

Choose an answer

Increases with time

Decreases with time

Changes with time

None of these

A toy car moves around a circular track of radius 0.3 m at the rate of 120 rev/min. The speed V of the car is:

Choose an answer

38 m/sec

3.8 m/sec

0.6 m/sec

None of these

The internal energy of a system does not depend upon the

Choose an answer

initial state of the system

final state of the system

path

none of them

More Classes

Other Links

Physics ECAT Pre Engineering 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