Question # 1

The formula of Brackett series can be obtained by putting in the general formula, the value of n equal to:

Choose an answer

one

two

three

four

five

The fourth band is a:

Choose an answer

Silver band

Red band

Gold band

Either A or C

Either A or B

When a body is moving on a surface, the force of friction is called

Choose an answer

Static friction

Dynamic friction

Limiting friction

Rolling friction

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

Choose an answer

0

1

low

any one of these

Alternating current can induce voltage because it has a

Choose an answer

High peak value

Varying magnetic field

Stronger field than direct curren

Constant magnetic field

In order to produce pair production, a photon must have a energy

Choose an answer

0.511 Me v

0.256 Me v

1.02 Me v

0.956 Me v

The energy of photon 'E' is proported to

Choose an answer

The magnetic field H

The electric field E

Both the electric and magnetic field H and E

Frequency

A lift is moving up with acceleration equal to 1/5 of that due to gravity. The apparent weight of a 60 kg man standing in lift is

Choose an answer

60 kg wt

72 kg wt

48 kg wt

Zero

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

When the total displacement is divided by total time taken, we get:

Choose an answer

Velocity

Average speed

Average velocity

None of these

SI unit of wave length is:

Choose an answer

Kilometer

Metre

Centimetre

Hertz

Bernoulli's equation is the fundamental equation in fluid dynamics, which relates pressure to fluid

Choose an answer

speed

height

none of them

both of them

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

An LED emits light when it is:

Choose an answer

Forward biased

Reverse biased

Operated without battery

Operated with heat source

None of these

Significant figures in 0.0010 are:

Choose an answer

Four

Three

Two

One

Recent studies of ferromagnetism have shown that there exists in ferromagnetic substances small regions called

Choose an answer

tiny regions

domains

vectors

none of them

Zirconia is classified as:

Choose an answer

Ceramic solid

Ionic compound

Metal

Either (A) or (B)

Either (B) or (C)

The ratio of the diameter of two convex lenses is _____-the ratio of their focal lengths:

Choose an answer

Greater than

Less than

Equal to

None of these

Which of the following theory completely explain the three types of materials

Choose an answer

Bohr model of electron distribution

Rutherford atomic model

Pauli's exclusion principle

energy band theory

In the forward biases situation, the current flowing across the p-n junction is a few:

Choose an answer

amperes

Milli amperes

Micro amperes

Pico amperes

None of these

First law of thermodynamic is special case of

Choose an answer

Law of conservation of energy

Charle's law

Law of conservation of mass

Boyle's law

The bicycle pump provides a good example of

Choose an answer

first law of thermodynamics

second law of thermodynamics

third law of thermodynamics

none of them

The reverse saturation current in a PN junction diode is only due to

Choose an answer

Majority carriers

Minority Carriers

Acceptor ions

Donor ions

Tick the conservative force

Choose an answer

Tension in a string

Air resistance

Elastic spring

Frictional force

Swimming is based on the principle of

Choose an answer

Newton's 1st law

Newton's 2nd law

Newton's 3rd law

All

SI Unit of work is

Choose an answer

Nm^-1

Joule

Nms

Both a and b

Which one is conservative force

Choose an answer

Electric force

Frictional force

Normal force

Air resistance

Force acting upon a charged particle kept between the plates of a charged condenser if F. IF one of the plates of the condenser is removed, force acting on the same will become

Choose an answer

Zero

F/2

F

2F

Crystalline solids are in the form of:

Choose an answer

Metals

Ionic Compounds

Ceramics

Both (A) and (B)

All of these

Eddy current is produced when:

Choose an answer

A metal is kept in varying magnetic field

A metal is kept in steady magnetic field

A circular coil is placed in a steady magnetic field

A current is passed through a circular coil

When monochromatic light is allowed to fall on cathode, it begins to emit electrons, these electrons are called

Choose an answer

thermoionic electrons

free electrons

photoelectrons

slow electrons

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