Question # 1

In radio-active decay, the original element which disintegrate to another element is called

Choose an answer

element

daughter element

parent element

none of these

Centripetal force for electron is given by

Choose an answer

mv²/ r

mv / r²

mv²/ r

mr²/ v

The velocity given to a body to go out of the influence of earth's gravity is known as:

Choose an answer

Terminal velocity

Orbital velocity

Escape velocity

None of these

Which of the following is scalar quantity?

Choose an answer

Electric potential

Velocity

Momentum

Force

The maximum drag force on a falling sphere is 9.8 N, it weight is

Choose an answer

1 N

9.8 N

4.9 N

Cannot be calculated

Pressure of a gas at constant volume is proportion to

Choose an answer

Total energy of gas

Average P.E to molecules

Average K.E of molecules

Total internal energy of gas

The number of LED'S needed to display all the digits is:

Choose an answer

Four

Five

Nine

Six

Seven

Which of the following is not mechanical wave?

Choose an answer

Sound wave

Light wave

wave produced in spring

None of them

In an A.C circuit with resistor only, the current and voltage have a phase angle of

Choose an answer

90°

0°

180°

none of these

Which one the following gives three regions of electromagnetic spectrum in order of increasing wavelength?

Choose an answer

Gamma rays, micro waves, visible light

Radio waves, ultraviolet waves, X-rays

Ultraviolet rays, infrared rays, micro waves

Visible light, gamma rays, radio waves

Which force is not a conservative force?

Choose an answer

Frictional force

Gravitational force

Electric force

Elastic spring force

If rope of lift breaks suddenly. The tension exerted by the surface of lift is (a=Acceleration of lift)

Choose an answer

mg

m (g+a)

m (g - a)

0

The volume of given mass of a gas will be doubled at atmosphere pressure if the temperature of the gas is changed from 150°C to

Choose an answer

300°C

573°C

600°C

743°C

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

In a normally biased n-p-n transistor, an electron c current I_Eflows from the

Choose an answer

emitter into the base

collector into the base

base into collector

none of these

The temperature of gas is produced by

Choose an answer

At potential energy of its molecules

The kinetic energy of its molecules

The attractive force between its molecules

The repulsive force between its molecules

When certain nucleus emits anα particle, its mass number:

Choose an answer

Increases by one

Decreases by one

Remain same

Decreases by four

None of these

R.M.S velocity of a particle is V at pressure P. If pressure increases by two times, then R.M.S velocity becomes

Choose an answer

2V

3V

0.5V

V

Centripetal force performs:

Choose an answer

Maximum work

Negative work

Positive work

None of these

The square of 0.4 is:

Choose an answer

Greater than 0.4

Smaller than 0.4

Equal to 0.4

None of them

The damping depends upon the

Choose an answer

amplitude

sharpness

both of them

none of them

The earth's potential is taken as

Choose an answer

Negative

Positive

Zero

Infinite

The rectangular components of a vector are equal in magnitude when the vector makes and angle _______with their x-component:

Choose an answer

0°

30°

45°

60°

Biomass includes:

Choose an answer

Crop residue

Natural vegetation

Animal dung

All of these

According to the law of conservation of linear momentum, the total linear momentum of an isolated system

Choose an answer

increases

decreases with time

remains constant

none of them

The intensity at a point due to a charge is inversely proportional to

Choose an answer

Amount of charge

Size of the charge

Distance between charge and the point

Square of the distance from the charge

None of these

The rain drop falling from the sky reach the ground with

Choose an answer

Constant terminal velocity

Constant gravitational acceleration

Variable acceleration

acceleration greater than g

Each atom in metal crystal:

Choose an answer

Remains fixed

Vibrates about a fixed point

Moves randomly

Rotates about center of a crystal

None of these

The direction of the streamlines is the same as the direction of the

Choose an answer

force

torque

velocity

weight

For a fixed force, larger is the mass of a body the

Choose an answer

greater is its acceleration

smaller is its acceleration

smaller is its weight

zero is its acceleration

Since the absolute scale is independent of the property of the working substance, hence, can be applied at

Choose an answer

very high temperature

very low temperature

any one of them

none of them

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