Question # 1

A complete amplifier circuit made on a silicon chip and enclosed in a small capsule is

Choose an answer

Inductor

Metal detector

Diode

Operational amplifier

The half life of uranium -238 is

Choose an answer

1620 years

4.5 x 10⁹years

3-8 days

23.5 minutes

The 'x' in X-rays means

Choose an answer

Xenon

Explosion

x for unknown

X makes the spot

Which of the following are electromagnetic waves.

Choose an answer

Alpha particles

Beta particles

Gama rays

Water 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

In which of the following studies x-rays are not helpful.

Choose an answer

Crystal structure

Crystal surface

Crystal symmetry

Crystal atoms

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 the fusion process, there are

Choose an answer

Hydrogen isotopes

Helium Isotopes

Carbon isotopes

Oxygen isotopes

In a fission reactor which particle causes a uranium -235 nucleus to split.

Choose an answer

Alpha particle

Gama ray

Neutron

Proton

The SI unit of absorbed dose in.

Choose an answer

Bel

Weber

Rem

Grey

Hydrogen bomb is based on

Choose an answer

Controlled chain reaction

Uncontrolled chain reaction

Nuclear fusion

Nuclear fission

The molecular weight of D2O is

Choose an answer

16

18

20

24

The average energy released per fission of U is about

Choose an answer

200 eV

2 keV

2 MeV

200 MeV

The number of electrons in U nucleus are.

Choose an answer

92

235

zero

143

The usefulness of X rays is largely due to their

Choose an answer

Mass

Density

Volume

Penetrating power

The most familiar example of radioactive dating is.

Choose an answer

Nitrogen dating

Carbon dating

Hydrogen dating

Helium dating

Which given element has lowest work function

Choose an answer

Na

Al

si

C

The radius of second orbit of hydrogen atom is

Choose an answer

0.071 A

0.142 A

4.752 A

9.5298 A

Which one of the following is a neutron absorber

Choose an answer

Pb

Cd

Cu

Ag

Lissajou's figures are used in a Cathode Ray Oscilloscope while measuring.

Choose an answer

Time period

Frequency

Voltage gain

phase angle

An important property of an ideal power supply is.

Choose an answer

Infinite internal resistance

Zero internal resistance

Large output resistance

Small output resistance

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