Question # 1

According to the de-Brogile relation, an object of large mass and ordinary speed has

Choose an answer

very small wavelength

very large wavelength

very small frequency

all of these

The time required for a radioactive material to decrease in active by one half is called

Choose an answer

half time

half life

disintegration time

mean life

magnetic field is a:

Choose an answer

Vector quantity

Scalar quantity

Scalar as well as scalar quantity

Any of (A) or (B)

Neither (A) nor (B)

The nucleus/nuclei of hydrogen is/are:

Choose an answer

Proton

Deuteron

Triton

All of these

None of these

The projectile motion is composed of

Choose an answer

horizontal motion only

vertical motion only

horizontal and vertical motion

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

The electric flux from a closed surface

Choose an answer

Is independent of the shape of the surface

Depends on the charge enclosed by the surface

Both a and b

None of the above

Fluids resist force, This property is called

Choose an answer

Stiffness

Strength

Ductility

Elasticity

The unit of induced emf is:

Choose an answer

Volt

Nm/As

Joule coul^-1

Both A and C

All of these

A relationship between Gauses of magnetic induction and Tesla(T) is given by

Choose an answer

G 10^-3T

G = 10^-2T

G = 10^-4T

G = 10^-1T

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

Choose an answer

0

1

low

any one of these

The rate of decay of radioactive substance

Choose an answer

is constant

decrease exponentially with time

varies inversely as time

decreases linearly with time

The free electrons in metals:

Choose an answer

Are in random motion and their speed depends upon temperature

Move in particular direction

Move with speed of light

Move such that their speed does not depend on their temperature

None of these

Referring to above figure, a changing current in coil P can be produced:

Choose an answer

At the instant the switch is closed

At the instant the switch is opened

With the help of rheostat

All of these

None of these

Amorphous solids are also more like

Choose an answer

crystalline solids

gases

liquids

any one of them

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)

An electron of charge e coulomb passes through a potential difference of V volts its energy in joules will be

Choose an answer

V/e

eV

e/V

V

The statement "the electric force of repulsion or attraction between two point charges is directly proportional to the product of the charges and inversely proportional to square of the distance between them" refer to

Choose an answer

Coulomb's law

Gauss's law

Biot-Sarwat law

Ampere's law

Michael Faraday and Joseph Henry belong respectively to

Choose an answer

USA and England

England and France

England and USA

USA and France

None of these

An object moving through a fluid experiences a retarding force called a

Choose an answer

frictional force

terminal force

opposing force

drag force

In the region surrounding a current carrying wire:

Choose an answer

A magnetic field is setup

The lines of force are elliptical

Direction of lines of forces depends upon direction of current

Both (A) and (C)

All of these

The smooth or steady stream-line flow is know as

Choose an answer

Laminar flow

Turbulent flow

Both a and b

None of the above

An object thrown upward with an initial velocity at certain angle with the horizontal and moving freely under the action of gravity is called

Choose an answer

a rocket

an aeroplane

a projectile

a ballon

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

The field around a moving charge is called

Choose an answer

magnetic field

conservative field

non-conservative field

none of these

The transition from solid to liquid is actually from:

Choose an answer

Order to disorder

Disorder to order

Order to order

Disorder to disorder

None of these

The loudness and pitch of a sound note depends on

Choose an answer

Intensity and velocity

Frequency and velocity

Intensity and frequency

Frequency and number of harmonic

A P-N juction or semiconductor diode cannot be used as

Choose an answer

A rectifier

Detector

Oscillator

An amplifier

Which of the following is most suitable as the core of transformer

Choose an answer

Soft iron

Alinco

Steel

None of these

The unit of viscosity is SI system is:

Choose an answer

Kg^-1m sec^-1

Kgm^-1 sec^-1

Kg^-1m^-1 sec

None of these

If a molecule with momentum mv strikes a wall and rebound then the change in momentum will be:

Choose an answer

-2 mv

Zero

2 mv

mv

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