Question # 1

Fog droplets are suspended in air when their weight is balanced by:

Choose an answer

Force of gravity

Upward trust due to air

Surface tension

None of these

If a force of 0.05 N produces an elongation of 20 mm in a string, then its spring constant will be:

Choose an answer

250 N m^-1

25 N m^-1

2.5 N m^-1

None of these

We cannot utilize the heat contents of oceans and atmosphere because

Choose an answer

there is no reservoir at the same temperature

there is no reservoir at the temperature lower than any one of two

there is no reservoir at the temperature higher than any one of two

none of them

In the formula R = N x m for diffraction grating, N denotes:

Choose an answer

No. of lines/cm

No. of lines/meter

Total number of lines

None of above

The current sensitivity of the galvanometer is

Choose an answer

C/BAN

BAN/C

CAN/B

CBN/A

The SI unit of electric field intensity is

Choose an answer

CN^-1

NC^-1or Vm^-1

JC^-1

AV^-1

In radio-active decay, the original element which disintegrate to another element is called

Choose an answer

element

daughter element

parent element

none of these

A body is moving through a viscous medium eventually comes to rest because of:

Choose an answer

Force of gravity

Force of friction

Its weight

Both A and C

When heat is added into the system then change in entropy is

Choose an answer

negative

positive

zero

any one of them

Heating effect of current utilized in:

Choose an answer

Electric motor

Electric toaster

Electroplating

Electric kettle

Both (B) and (D)

The driection of vector si space is specified by:

Choose an answer

One angle

Two angles

Three angles

None of above

A tube tapers from 20 cm diameter to 2 cm, the velocity at first cross-section is 50 ms^-1then velocity at second cross-section is

Choose an answer

5000 cms^-1

500 cms^-1

50 cms^-1

0.5 cm/s

The unit of spring constant is:

Choose an answer

J-sec

Metre

Nm^-1

None of these

The current in LCR circuit will be maximum whenωis

Choose an answer

As large as possible

Equal to natural frequency of LCR system

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

The number of all the protons and neutrons in a nucleus is known as

Choose an answer

atomic number

mass number

charge number

none of these

The useful unit of the angular displacement in SI unit is:

Choose an answer

Degree

Revolution

Radian

Metre

Physics details with the study of:

Choose an answer

Matter

Energy

Both of them

Human body

The frequency of free vibrations is known as

Choose an answer

free frequency

forced frequency

natural frequency

un-natural frequency

A heavily damped system has a fairly

Choose an answer

sharp resonance curve

flat resonance curve

both of them

none of them

By which velocity a ball be projected vertically so that the distance covered by it in 5th seconds is twice the distance it covers in its 6th second ( g=10m/s²)

Choose an answer

58.8 m/s

49 m/s

65 m/s

19.6 m/s

The doped semi-conductor materials are known as

Choose an answer

intrinsic semi-conductor

extrinsic semi-conductor

either of them

none of them

The field in which work done in moving a body between two points depends upon the path followed is called:

Choose an answer

Conservative field

Non-conservative field

Electric field

None of these

Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:

Choose an answer

50

100

150

200

250

A coil of constant area is placed in a constant magnetic field. An include current is produced in the coil when:

Choose an answer

The coil is destroyed

The coil is Rotated

The coil is neither destroyed nor rotated

Both (A) and (B)

None of these

Bernoulli's equation is based upon law of conversation

Choose an answer

Mass

Momentum

Energy

None of these

Teh consumption of energy by a 1000 watt heater in half an hour is:

Choose an answer

5 Kwh

0.5 Kwh

2.5 Kwh

3.2 Kwh

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

Gaussian surface is always:

Choose an answer

Rectangular

Spherical

Cylinder

Box shape

Any of these

If the radius of first orbit of hydrogen atom is 0.53° A the radius of second orbit will be

Choose an answer

2.120°A

0.212°A

21.2°A

0.14°

a

The un-steady streamline flow is called

Choose an answer

laminar flow

turbulent flow

both of them

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