Question # 1

Lorentz force is defined as

Choose an answer

q(E + V x B)

q(E x B + V)

q(E x V + B)

q(E x B)

Wave nature of particle was proposed by

Choose an answer

Einstein

Plank

De-Brogile

Max well

No spark plug is needed in

Choose an answer

petrol engine

diesel engine

both of them

none of them

When a transistor is used as a switch the circuit in which the current is to be switched OFF and ON, is connected between the

Choose an answer

base and emitter

collector and emitter

base and collector

any one of these

Consider a spherical shell of metal at he centre of which a positive point charge is kept

Choose an answer

The electric filed is zero outside the shell

The electric field is zero everywhere

The electric field is zero in the region inside the shell

The electric field is non-zero in both regions outside and inside the shell

The passage of current is accompanied by a magnetic field in the surrounding space:

Choose an answer

Always accompanied

Sometimes accompanied

Never accompanied

Any of above

None of these

The basis to define a temperature scale that is independent of material properties is provided by

Choose an answer

carbon cycle

nitrogen cycle

Carnot cycle

irreversible cycle

The half life of uranium-238 is

Choose an answer

6.2 x 10⁹years

4.5 x 10⁹days

4.5 x 10⁹years

1.3 x 10⁶years

The example of irreversible process is

Choose an answer

slowly liquification

slowly evaporation

an explosion

all of them

The total number of lines of magnetic induction pasing through a surface perpendicular to the magnetic field is called

Choose an answer

magnetic flux

magnetic flux density

magnetic induction

magnetic field intensity

Alternating current can be transmitted:

Choose an answer

To long distance

At very high cost

At very low cost

Both (A) and (C)

Both (A) and (B)

The positron was discovered by:

Choose an answer

In cosmic radiation

In 1932

By Carl Anderson

All above

By direc

One electron volt is equal to

Choose an answer

1.6 x 1019eV

6.25 x 1018 eV

1.6 x 1018 eV

6.25 x 1019eV

According to the second law, which is must to produce work

Choose an answer

a source contains a large amount of heat energy

two sources at the same temperature

two sources at the different temperatures

a source contains a small amount of energy

When weight of an object falling freely becomes equal to the drag force, then the body will move with

Choose an answer

increasing speed

decreasing speed

constant speed

none of them

S.I. unit of planks constant is

Choose an answer

J-s^-1

J.s

J.s^-2

J.s²

The mass of a body measured by a physical balance in a lift at rest is found to be m, if the lift is going up with an acceleration a, its mass will be measured as

Choose an answer

m (1 - a/g)

m (1 + a/g)

m

Zero

A fluid at a certain point has 50 J of potential energy per unit volume, 75 J of kinetic energy per unit volume,and 35 J of pressure energy per unit volume. the total energy of the fluid is

Choose an answer

125 J

90 J

160 J

85 J

A string is stretched between two points and is plucked at right angles to its length, the vibration produced is:

Choose an answer

Longitudinal wave

Transverse wave

No vibration at all

None of them

The charge per unit time through any cross-section of a conductor is called

Choose an answer

capacitance

electric power

current

potential difference

When current passes through a solenoid coil, it behaves like a

Choose an answer

loop

circle

bar magnet

none of these

The first super conductor was discovered in

Choose an answer

1811

1890

1901

1911

In the same medium, velocity of the wave:

Choose an answer

Goes on increasing

Remains constant

Goes on decreasing

None of these

Specific heat at constant pressure is greater than the specific heat at constant volume because

Choose an answer

Heat is used up to increase temperature at constant pressure

Heat is used by gas for expansions purposes at constant pressure

Heat is use dup to increase internal energy

The above statement is invalid

Resonance occurs when one of the natural frequencies of vibration of the forced or driven harmonic oscillator

Choose an answer

greater than the frequency of applied force

equal to the frequency of applied force

less than the frequency of applied force

all of them

The phase at the positive peak of an A.C. cycle is:

Choose an answer

0º

90º

180º

0 andᏘ

Ꮨ/2 and 3Ꮨ/2

Which one of the following waves belongs to electromagnetic spectrum

Choose an answer

Radio and TV waves

Radar waves

Micro waves

All of them

If a car rest acceleration uniformly to a speed of 144 km/h in 20 s it covers a distance of

Choose an answer

20 m

400 m

1440 m

2880 m

When the temperature of source and sink of a heat engine become equal entropy change will be

Choose an answer

Zero

Max

Min

-ve

The mass of an object will be doubled at speed

Choose an answer

1.6 x 10⁸ms^-1

2.6 X 10⁸ms^-1

2.6 x 10⁷ms^-1

2.6 x 10⁹ms^-1

For an atom having atomic number Z and atomic weight A, the number of electron in an atoms

Choose an answer

A - Z

A + Z

Z

A

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