Question # 1

The bunding energy per nucleon for iron is.

Choose an answer

zero

Maximum

Negative

Minimum

Alpha particles emitted from a radioactive material are.

Choose an answer

He nucliei

H -nucliei

Li nucliei

B nucliei

Nuclear force as compared to electrostatic force is.

Choose an answer

Weaker and long range

Weaker and short range

Stronger and longer range

Stronger and short range

A solid state detector is basically

Choose an answer

A reverse biased p-n junction

A forward biased p-n junction

A p-n -p transistor

A n-p-n transistor

LASER is a device which can produce.

Choose an answer

Monochromatic beam of light

Coherent beam of light

An intense beam of light

All of the above

For the normal operation of transistor the emitter base junction is always.

Choose an answer

Zero biased

Reverse biased

Forward bised

Both a and b

In which reaction two or more small light nuclei nuclei come together or fuse to form a large nucleus.

Choose an answer

Radioactivity

Radioactivity dating

Nuclear fusion

Nuclear fission

The total energy of the hydrogen atom is

Choose an answer

zero

Infinite

positive

Negative

What is the basic advantage of class A operation of an amplifier.

Choose an answer

It has high efficiency

It has high gain

It has low distortion

It has high distortion

The division and germier experiment relates to

Choose an answer

Diffusion

interference

Polarization

Electron diffraction

Most widely used types of gas LASER are

Choose an answer

Neon

Argon ion

Helium

All of these

The maximum K.E of photo electrons depends upon

Choose an answer

Energy of incident radation

Frequency of incident radiation

Wavelength of incident radiation

Mass of incident radiation

The half life of uranium -238 is

Choose an answer

1620 years

4.5 x 10⁹years

3-8 days

23.5 minutes

There are how many modes of operations of a BJT.

Choose an answer

2

3

4

5

In electromagnetic spectrum X-rays are next to.

Choose an answer

Water waves

Radio waves

ultraviolet waves

Infrared waves

In n-p-n transistor the current flows in the direction from

Choose an answer

Emitter to base

emitter to collector

Base to emitter

Base to collector

Matter waves

Choose an answer

Are electromagnetic in nature

Travel with the speed of light

Can be diffracted

Are longitudinal waves

A CE amplifier with by passed emitter resistor is an example of.

Choose an answer

Current series feedback

Voltage sires feed back

Current shunt feedback

Voltage shunt feed back

The electrons behave as waves, because they can .

Choose an answer

Produce ions in gases

Diffracted by a crystal

Be deflected by electric fields

Be deflected by magnetic fields

A logic circuit with one input and one output that inverts the input signal at the output is.

Choose an answer

AND gate

NOT gate

OR gate

NOR gate

The angle of scattering for which the Compton shift is maximum is.

Choose an answer

0^o

45 ^o

80 o

180^o

More Classes

Other Links

PPSC Physics Chapter 7 Modern Physics 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