Question # 1

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

The band above the valence band is called

Choose an answer

high energy band

conduction band

empty band

none of them

Phenomenon of radioactivity is due to disintegration of

Choose an answer

nucleus

neutron

proton

molecule

Arsenic, antimony and phosphorus are the elements from

Choose an answer

third group

fourth group

fifth group

none of them

When the waveform of one voltage is increasing and that of second is decreasing and vice versa, then phase difference between these voltage is

Choose an answer

90°

75°

0°

180°

Referring to above figure, current in the coil P grows from zero to its maximum value:

Choose an answer

At the instant the switch is closed

At the instant the switch is opened

When switch is kept open

All of above

Neither of above

When a position comes close to an electron they annihilate into photons such that

Choose an answer

each photon has energy 0.51 Me v

each photon has energy 1.02 Me v

each photon has energy 0.25 Me v

none of these

The motion of a body in a straight line is the motion in

Choose an answer

one dimension

two dimension

three dimension

four dimension

The bob of a simple pendulum is suspended by

Choose an answer

string

heavy inextensible string

light extensible string

light inextensible string

While deriving equation of pressure by kinetic theory of gases, we take into account:

Choose an answer

Only linear motion of molecules

Only rotational motion

Only vibratory motion

All of these

The emission of electrons from a metal surface when exposed to light of suitable frequency is called the

Choose an answer

pair production

Compton effect

photoelectric effect

relativity

The number of vibrating body at any instant from its equilibrium position is called

Choose an answer

displacement

frequency

amplitude

time period

Electron volt is the unit of.

Choose an answer

Potential difference

Energy

Resistance

Capacitance

The discuss used by athlete has a mass of 1 kg, its weight in newton is

Choose an answer

9.8 N

80 N

98 N

100 N

Structure of the nucleus was explained by

Choose an answer

J.J Thomson

Bohr

Millikan

Rutherford

When the droplet moves with terminal velocity in a fluid, the net force acting on the droplet is:

Choose an answer

F_D-mg

Zero

mg-F_D

None of these

For a n-p-n transistor, the conventional current equation can be written as

Choose an answer

I_E+ I_C= I_B

I_C- I_B= I_E

I_C+ I_B= I_E

I_B+ I_E= I_C

The working of galvanometer depends upon torque exerted on a current carrying coil in

Choose an answer

magnetic field

electric field

gravitational field

nuclear field

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 energy stored in a charge capacitor

Choose an answer

1/2CV²

1/2C²V

1/2C/V²

None of these

Mathematical manipulation of the two quantized states can be best carried if they are represented by

Choose an answer

high - low

yes - no

on - off

0 - 1

A point charge Q is placed at the mid-point of a line joining two charges. 4q and q. if the net force on charge q is zero. then Q must be equal to

Choose an answer

-q

+q

-2q

+4q

The unit of resistance is

Choose an answer

volt

ampere

ohm

coat

The existence of position was predicted by Dirace in

Choose an answer

1920

1925

1930

1928

The total charge of any nucleus is given as

Choose an answer

Ze²

Z²e

Z/e

Ze

When low energy photon interact with a metal,which of the following effect is likely to be taken place

Choose an answer

pair production

photoelectric

Compton effect

None of these

The Einstein's changes in length, mass and time are not observed in common life because

Choose an answer

We dont observer then seriously

The masses are too large

Their speed is too small than the speed of right

All of the above

The nucleus left after the emission of some radiation is called:

Choose an answer

Parent nucleus

Daughter necleus

Mother necleus

Any of these

None of these

Fluid friction is _____ the friction between two solid surfaces:

Choose an answer

Greater than

Smaller than

Equal to

None of these

The CRO is used for displaying the waveform of a given

Choose an answer

current

voltage

both of them

none of them

If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by

Choose an answer

-4

4

2

1

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