Question # 1

Electric field lines emerge from the charge in:

Choose an answer

One dimension

Two dimensions

Three dimensions

Four dimensions

None of them

The magnitude of induced emf depends upon the

Choose an answer

Rate of decrease of magnetic field

Rate of change of magnetic field

Rate of increase of magnetic flux

Constancy of magnetic field

None of these

SI unit of current describes the flow of charge at the rate of

Choose an answer

One ampere per second

One coulomb per second

One electron per second

6.25 x 10¹⁸electrons per second

Both B and D

The internal energy of an ideal gas system is generally the

Choose an answer

translational K.E of molecules

vibrational K.E of molecules

rotational K.E of molecules

all of them

The number if neutrons in the nucleus of ₉₂U²³⁵are

Choose an answer

Infinite

92

235

143

According to the special theory of relativity, time is

Choose an answer

absolute quantity

not absolute quantity

constant quantity

none of these

Adiabatic change occurs when the gas

Choose an answer

expands

compressed

expands or compressed

expands or compressed rapidly

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

In describing functions of digital systems, a closed switch will be shown as

Choose an answer

0

1

low

any one 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.

Amperean path is a:

Choose an answer

Closed path

Rectangular path

Circular path

Any of above

Broken path

According to the special theory of relativity

Choose an answer

mass and energy are same entities

mass and energy are same entities but interconverible

mass and energy are different entities but interconverible

mass and energy are different entities but non-interconveritble

Each atom in a metal crystal vibrates about a fixed point with an amplitude that:

Choose an answer

Decrease the rise in temprature

Is not affected by rise in temprature

Increase with rise in temprature

Both (B) and (C)

None of these

As the light shines on the metal surface, the electrons are ejected

Choose an answer

slowly

instantaneously

either of these

none of these

Due to relative motion of observer and the frame of reference of events, time always:

Choose an answer

Dilates itself

Contracts itself

Stretches itself

Both (A) and (C)

None of these

In a semi-conductor material, current flows due to

Choose an answer

positive charge

negative charge

both of them

none of them

A particle having mass and charge equal to that of an electron is called:

Choose an answer

Proton

Positron

Pion

Pi-meson

Both (C) and (D)

When a platinum wire is heated, it appears yellow at

Choose an answer

1600°C

900°C

1100°C

1300°C

In a container having water filled up to a height h, a hole is made in the bottom. The velocity of water flowing out of the hole is

Choose an answer

Independent of h

Proportional to h^1/2

Proportional to h

Proportional to h²

SI unit of frequency is

Choose an answer

second

hertz

revolution

vibrations/sec

An amount of water of mass 20 g at 0°C is mixed with 40 g of water at 10°C. Final temperature of mixture is

Choose an answer

-20°C

6.67°C

5°C

0°C

Two projectiles are fired from the same point with the same speed at angles of projection 60° and 30° respectively. Which one of the following is true?

Choose an answer

Their range will be same

Their maximum height will be same

Their landing velocity will be same

Their time of flight will be same

The unit of intensity of electric field is

Choose an answer

newton/coluomb

jule/coluomb

volt x metre

newton/metre

A snooker ball moving with velocity V collides head on with another snooker ball of same mass at rest. If the collision is elastic, the velocity of second snooker ball is

Choose an answer

Zero

Infinity

V

2 V

If one of the pipes has a much smaller diameter than the other and are placed horizontally then form both sides of Bernoulli's equation, we can drop the term

Choose an answer

P

1/2 fv²

pgh

none of them

The rate at which the free electrons pass through any section of a metallic wire from right to left is:

Choose an answer

Greater than the speed at which they pass from left to right

Less than the speed at which they pass from left to right

The same speed at which they pass from left to right

Any of above

None of them

Two samples A and B of a gas initially of the same temperature and pressure are compressed from a volume V to a volume V/2 such that A is compressed isothermally and B adiabatically. The final pressure

Choose an answer

A greater than than of B

A is equal to that of B

A is less than that of B

A is twice the pressure of B

The value of threshold frequency for different metals is

Choose an answer

different

same

may be different or may be same

none of these

Laws of motion are not valid in a system which is

Choose an answer

inertial

non-interial

at rest

moving with uniform velocity

When an electron is accelerated through a P.D. of an one volt, it will acquire energy equal to

Choose an answer

One joule

One erg

One electron volt

None of these

A non-inertial frame of reference is one, in which

Choose an answer

law of inertial is valid

all laws of physics are the same in all frames

a>0 or a<0

a=0

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