Question # 1

A water hose with an internal diameter of 20 mm at the outlet discharges 30 kg of water in 60 s. What is water speed at the outlet if density of water is 1000 kg/m³during its steady flow

Choose an answer

1.3 m/s

1.6 m/s

1.9 m/s

2.2 m/s

According to Stoke's law, drag force depends on

Choose an answer

Initial velocity

Final velocity

Terminal velocity

Instantaneous velocity

When a constant potential difference is applied across the conductor, the drift velocity of electrons:

Choose an answer

Increases

Decreases

Remains the constant

Either of these

None of these

In a normal healthy person the value of diastolic pressure is

Choose an answer

75 - 80 torr

100 torr

120 torr

none of them

If two bodies of equal masses moving in the same direction collide elastically, then their velocities.

Choose an answer

Are added

Are subtracted

Do not change

Are exchanged

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

The time period of pendulums of different lengths would be

Choose an answer

same

different

both of them

none of them

According to kinetic theory of gases, molecules of a gas behave like

Choose an answer

Inelastic spheres

Perfectly elastic rigid sphere

Perfectly elastic non-rigid spheres

Inelastic non-rigid spheres

A railway engine (mass 10⁴kg) is moving with a speed of 73 km/h. The force which should be applied to bring it to rest over a distance of 20 m is

Choose an answer

3,600 N

7,200 N

10,000 N

100,000 N

When a body is vibrating, the displacement from mean position:

Choose an answer

Increases with time

Decreases with time

Changes with time

None of these

When the shear stress and shear stain are involved, then their ratio is called

Choose an answer

Young's modulus

Bulk modulus

Shear modulus

all of them

The torque is taken as positive when it is

Choose an answer

Clockwise

Anticlockwise

Both

None of these

Source of light used in the fibre optic communication

Choose an answer

Led

Laser

Photo diode

Both a and b

The energy stored in a wound watch spring is

Choose an answer

K.E

P.E

Heat energy

Chemical energy

When the temperature difference between the source and the the sink increases, the efficiency of the heat engine will

Choose an answer

Increase

Decrease

Is not affected

May increase or decrease depending upon the nature of the working substance

A pulse of light in the optical fibres represents the number

Choose an answer

0

1

2

3

Refractive index of material depends upon

Choose an answer

Nature of material

Wave length

Temperature

All of these

The feature/features of powered ballistic missiles are

Choose an answer

Long ranges

Greater precision

Remote controlled

All of these

In case of streamed lined flow of liquid.the loss of energy is

Choose an answer

Maximum

Minimum

Infinite

Equal to what is in turbulent flow

The lower refractive index the fibre core has

Choose an answer

1.48

1.40

1.54

1.42

A person is sitting in a traveling train and facing the engine.He tosses up a coin and the coin falls behind him.It can be concluded that the train is

Choose an answer

Moving forward and gaining speed

Moving forward forward and losing speed

Moving forward with uniform

Moving backward with uniform speed

When the pressure of a fixed mass of a gas is decreased under isothermal condition there is

Choose an answer

Fall of temperature

Increase of density

No change in internal energy

A decrease in the value of PV

More Classes

Other Links

Physics General Science Test Medium Mode 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