Question # 1

Angle between the ray of light and the corresponding wavefront is:

Choose an answer

0°

60°

90°

120°

The electrons occupying the conduction band are known as

Choose an answer

conduction electrons

free electrons

both of them

none of them

An electron is accelerated through a potential difference of 50v. its de-Brogile wavelength is

Choose an answer

1.66 x 10^-29m

1.74 x 10^-10cm

17.4 x 10^-6m

1.74 x 10^-10m

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)

Acceleration of the mass at any instant is given by

Choose an answer

a=k/m x

a= - m/k x

a = - k/m x

a=m/k x

In case of point, source of light shape of wavefront is:

Choose an answer

Spherical

Cylindrical

Plane

None of these

Conversion of chemical energy to electrical energy can be achieved by:

Choose an answer

Primary cell

Secondary cell

Both (A) and (B)

Photovoltaic cell

Solar cell

The path (or trajectory) described by a projectile is

Choose an answer

a parabola

a hyperbola

a circle

a straight line

The emf is measured in:

Choose an answer

Newton

Volt

J/C

Both A and B

Both B and C

The nature of radiations emitted by a hot body depends upon its:

Choose an answer

Metarial

Temperature

colour

Volume

Length

In case of mechanical waves, we study the motion of

Choose an answer

a single particle

collection of particle

any one of them

none of them

Where the streamlines are very far apart from each other, the pressure will be

Choose an answer

low

zero

high

all of them

A one microfarad capacitor of a TV is subjected to 4000 V potential difference. The energy stored in capacitor is

Choose an answer

8 J

16 J

4 x 10^-3J

2 x 10^-3J

The r.m.s. value of alternating current is equal to its maximum value at angle of

Choose an answer

60°

45°

30°

90°

The ratio of the size of the image to that of object is called:

Choose an answer

Focal length

Aperture

Linear magnification

Principal axis

When a platinum wire is heated, it appears yellow at

Choose an answer

1600°C

900°C

1100°C

1300°C

Maximum density of H₂O is at the temperature

Choose an answer

32°F

39.2°F

42°F

4°F

Albert Einstein got the Nobel prize in physics for his explanation of photoelectric effect in

Choose an answer

1916

1919

1921

1923

In magnet-coil experiment, emf can be produced by:

Choose an answer

Keeping the coil stationary and moving the magnet

Keeping the magnet stationary and moving the coil

Relative motion of the loop and magnet

Any one of above

All above

Electric flux is:

Choose an answer

Cross product of two vector

Dot product of two vectors

A vector quantity

A scalar quantity

Both (B) and (D)

Silicon can be obtained from:

Choose an answer

Lead

Uranium

An isotope of oxygen

Sand

Which of the following does not exhibit S.H.M?

Choose an answer

a plucked violin string

a mass attached to a spring

a train shunting between two terminals

a simple pendulum

Generally a temperature scale is established by using certain physical properties of a material which varies

Choose an answer

nonlinearly with temperature

linearly with temperature

either of them

none of them

When two objects are rubbed together, their internal energy

Choose an answer

remains same

decreases

remains the same then decreases

increases

Magnetic induction is also called as:

Choose an answer

Ampere’s law

Faraday’s law

Lenz’s law

Newton’s law

Coulomb’s law

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 are not the elementary particles?

Choose an answer

Photons

Leptons

Hadrons

Quarks

None of these

Mass of proton is of order of

Choose an answer

10^-31gm

10^-27kg

10^-24gm

10⁺²⁷kg

The value of relative permittivity of different dielectrics are:

Choose an answer

Equal

Different

Greater than one

Smaller than one

Both (B) and (C)

Hydrogen atom with only one proton and one neutron in its nucleus, and one electron, is called

Choose an answer

deuterium

protium

tritium

none of these

When an object moves with a uniform angular velocity, then its instantaneous angular velocity is equal to:

Choose an answer

Zero

Its average velocity

Its angular displacement

None of these

More Classes

Other Links

ECAT Pre General Science 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