Question # 1

When an electron and a positron are annihilated, then number of protons produced is.

Choose an answer

1

2

3

4

Mosley's law establishes the X-rays fluorescence of target element with is.

Choose an answer

Atomic weight

Atomic number

Density

Lattice constant

Which given element has lowest work function

Choose an answer

Na

Al

si

C

The total number nucleons in a nucleus are called.

Choose an answer

Mass number

Atomic number

Neutron number

Isotopes

One radian is equal to.

Choose an answer

0.1 Gy

0.01 Gy

0.001 Gy

0.0001 gy

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

Choose an answer

Alpha particle

Gama ray

Neutron

Proton

Which Isotopes is use din radioactive dating.

Choose an answer

C¹²

C¹³

C¹⁴

C¹⁶

The nucleus of tritium is called.

Choose an answer

Proton

Triton

Deuleron

Positron

LED is a p-n junction that emits

Choose an answer

Visible light

X- rays

Ultraviolet light

electromagnetic waves

A factory buy 100 g of a radioactive chemical with a half life of 5 years which decays to a stable compound How much of the chemical will still be radioactive 10 years time.

Choose an answer

25 g

50 g

75 g

100 g

Which particle is removed by a photon.

Choose an answer

Quark

Electron

Proton

Neutron

The most convenient unit for energy at the atomic level is.

Choose an answer

Joule

Watt second

Newton metre

Electron volt

In radiotherapy X-rays are used to.

Choose an answer

Treat cancer

Delect bone fracture

Cure heart diseasee

All of the above

The emission of Beta particle from protonium -218 results in the formation of.

Choose an answer

Protactinium -231

Thorium -232

Astatine -218

Radon -222

The tunnel effect makes possible

Choose an answer

Alpha decay

Gama rays

Positive Beta decay

negative Beta dacay

A gama ray of energy 1900 MeV is absorbed by

Choose an answer

Proton antiproton pair

Electron positron pair

Producing heat in the substance

The orbit

The energy delivered to the tissue per unit mass is called the absorbed dose of.

Choose an answer

X rays

gama rays

Radiation

energy

The energy that must be added to separate the nucleus is called.

Choose an answer

Critical energy

Binding energy

Gravitational energy

Electrostatic energy

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

An operational amplifiers will act as an inverting amplifier when the input signal is connected to.

Choose an answer

Inverting terminal

Non inverting terminal

Earthened wire

Both a and b

A darling ion amplifier is characterized by

Choose an answer

High voltage and current gain

High input resistance and current gain

High output resistant and current gain

Low input resistance and current gain

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