Question # 1

'K' is the proportionality constant of force experienced by conductor. What is the value of 'K' in SI units?

Choose an answer

0

1

0.5

-1

Another mean of electric potential energy per unit charge is given by:

Choose an answer

Electric intensity

Potential gradient

Electric Flux

Potential difference

None of these

An irreversible heat flow from a hot to cold substances of a system, causes the disorder to

Choose an answer

decrease

remains the same

increase

any one of them

Which force is not a conservative force:

Choose an answer

Frictional force

Gravitational force

Electric force

Elastic spring force

The neighbours of every molecule in crystalline solids are arranged in

Choose an answer

an irregular manner

a regular manner

any manner

none of them

The work performed on an object does not depend on:

Choose an answer

Force applied

Angle at which force is inclined to the displacement

Initial velocity of the object

Displacement

The maximum drag force on a falling sphere is 9.8 N, it weight is

Choose an answer

1 N

9.8 N

4.9 N

Cannot be calculated

According to Rutherford atomic model, the positive charge in an atom

Choose an answer

is concentrated at its centre

is in the form of positive electron at same distance from its centre

is spread uniformly through its volume

none of these

A process in which no heat enters or leaves the system is called

Choose an answer

isochoric process

isothermal process

adiabatic process

none of them

The size of the image is maximum when its distance from the magnifying glass is:

Choose an answer

0.10 m

0.15 m

0.20 m

0.25 m

A train is moving with a velocity of 25 m/s and a car is moving behind it by a velocity of 8 m/s in same direction. The relative velocity of train with respect to car is

Choose an answer

17 m/s

33 m/s

17.5 m/s

none

A heat engine is that which converts

Choose an answer

mechanical energy into thermal energy

thermal energy into mechanical energy

K.E into potential energy

heat energy into light energy

Fluid friction is _____ the friction between two solid surfaces:

Choose an answer

Greater than

Smaller than

Equal to

None of these

A body is executing free vibrations when it oscilates

Choose an answer

with the interference of an external force

without the interference of an external force

with the interference of an internal force

none of them

Conversion of A.C. into D.C. is called:

Choose an answer

Reftification

Amplification

Electric induction

Magnetic induction

None of these

The vibrations of factory floor caused by the running of heavy machinery is an example of

Choose an answer

free vibration

natural vibrations

forced vibrations

all of them

A dimension stands for the ___________ nature of certain physical quantity.

Choose an answer

super

Quantitative

Qualitative

Both B and C

X-rays produced in a tube operating at 10⁵V. The speed of X-rays produced is

Choose an answer

3 x 10⁸m/s

3.1 x 10⁸m/s

2.8 x 10⁸m/s

1.88 x 10⁸m/s

A flywheel accelerates from rest to an angular velocity of 7 rad/sec in 7 seconds. Its average acceleration will be:

Choose an answer

49 rad/sec²

1 rad/sec²

0.16 rev/sec²

Both A and C

Both B and C

For an atom having atomic number Z and atomic weight A, the number of electron in an atoms

Choose an answer

A - Z

A + Z

Z

A

An inertial frame of reference is that frame of reference in which

Choose an answer

a = 0

a > 0

a < 0

all of them

The value of the Stephen's constant for black body radiations is given by

Choose an answer

5.6 x 10⁸Wm^-2K^-4

5.67 x 10^-8Wm^-2K^-4

2.9 x 10^-3mK

2.9 x 10³mK

If the ends of a wire are connected to a battery an electric field E will be set up at:

Choose an answer

The ends of the wire only

Mid points of the wire only

Every point within the wire

At nodes only

Both (B) and (D)

The vibratory motion of a body whose magnitude of acceleration is directly proportional to the magnitude of its displacement and is always directed towards the equilibrium position is called

Choose an answer

rotatory motion

motion under gravity

angular motion

simple harmonic motion

Mass of neutron is

Choose an answer

1.67 x 10^-31kg

1.67 x 10^-27kg

9.1 x 10^-31kg

1.67 x 10^-19kg

Field lines are closer to each other in the region where the filed is

Choose an answer

Stronger

Weaker

Much weaker

Absent

None of these

The magnifier forms a virtual image of the object at:

Choose an answer

Least distance of distinct vision

Much farther than the least distance

Both A and B are correct

None of these

A conducting wire is drawn to double its length. Final resistivity of the material will be

Choose an answer

Double of the original one

Half of the original one

One fourth of the original one

Same as original one

The disorder in the system increases due to the

Choose an answer

removal of heat

addition of heat

removal or addition of heat

none of them

Graph of Black body radiation is example of

Choose an answer

Band spectra

Continuo's spectra

Line spectra

All

The information from far side of the universe are gathered by

Choose an answer

Radio telescope

Microscope

Telescope

Spectro scpe

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