Question # 1

In case of metallic conductors, the charge carriers are

Choose an answer

Protons

Electrons

Antiprotons

Positrons

Both A and B

No spark plug is needed in

Choose an answer

petrol engine

diesel engine

both of them

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 velocity of sound in air depends upon

Choose an answer

Density and elasticity of gas

Pressure

Wavelength

Amplitude and frequency of sound

A 120 m long train is moving in a direction with speed 20 m/s. A train B moving with 30 m/s in the opposite direction and 130 m long crosses the first train in a time

Choose an answer

6 s

36 s

38 s

None of these

Brownian motion increases due to

Choose an answer

Increase in size of Brownian particle

Increase in temperature of medium

Increase in density of medium

Increase in viscosity of medium

When the particles of the medium vibrate about their mean position, along the direction of the motion of waves, then the waves are called:

Choose an answer

Longitudinal waves

Transverse waves

Water waves

Complex waves

With increase of temperature, the viscosity of liquid and gases

Choose an answer

Increases for both

Decreases for both

Increases for liquids and decreases for gases

Decreases for liquids and increases for gases

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 electric intensity outside the two oppositely charged parallel metal plates is

Choose an answer

Maximum

Minimum

Zero

Infinite

Which waves are used in sonography?

Choose an answer

Microwaves

Infra red waved

Sound waves

Ultrasonic waves

Rest mass energy of electron is:

Choose an answer

1.02 MeV

0.51 MeV

931 MeV

200 MeV

In order to increase the K.E of ejected photo electrons, there should be an increase in:

Choose an answer

Intensity of radiation

NoneI

Frequency of radiation

Both (b) & (c)

Recent studies of ferromagnetism have shown that there exists in ferromagnetic substances small regions called

Choose an answer

tiny regions

domains

vectors

none of them

A chocolate cookie is a circular disk of diameter 8.5 ± 0.02 cm and thicknes 0.050 ± 0.005 cm the average volume in cm³ is

Choose an answer

2.83 ± 0.3

2.38 ± 0.27

11.35 ± 1.2

9.31 ± 1.12

Which of the following is not a perfectly inelastic collision?

Choose an answer

Striking of two glass balls

A bullet striking a bag of sand

An electron captured by a proton

A man jumping onto a moving cart

In YDS experiment, at the center of screen is formed a:

Choose an answer

Dark fringe

Bright fringe

No fringe at all

None of these

If the red light is replaced by blue light illuminating the object in a microscope the resolving power of the microscope

Choose an answer

Decreases

Increases

Gets halved

Remains unchanged

Which light travels faster in optical fibres?

Choose an answer

visible light

ultraviolet

infra-red

any one of them

Geysers usually occur in

Choose an answer

Hot regions

Cold region

Volcanic regions

All of these

Blood is an/a

Choose an answer

Ideal fluid

Perfect fluid

Compressible fluid

Incompressible fluid

Period of typical radio waves is

Choose an answer

1 × 10^-8 sec

1 × 10^-6 sec

1 × 10^-5 sec

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