Recent questions tagged thermionic emission

+3 votes

1 answer

State three ways of obtaining an electron-beam.

asked Apr 1, 2019 in Class 10 by kratos

+3 votes

1 answer

A nucleus of an element has the symbol 84P^202, and emits an α-particle and then a β-particle.

asked Mar 28, 2019 in Class 10 by kratos

+3 votes

1 answer

Complete the following fission reaction 92U^235 0n^1 → aSb^133 + 41Co^b + (4, 0)n1 + energy Write down the values of a and b.

asked Mar 26, 2019 in Class 10 by kratos

+2 votes

1 answer

Name the radioactive radiations which have the least penetrating power.

asked Mar 20, 2019 in Physics by kratos

+2 votes

1 answer

A radioactive nucleus undergoes a series of decays according to the sequence

asked Mar 19, 2019 in Class 12 by kratos

+1 vote

1 answer

The strong nuclear force acts over the distance

asked Mar 18, 2019 in Class 10 by kratos

+2 votes

1 answer

Give two important precautions that should be taken while handling radioactive materials.

asked Mar 17, 2019 in Physics by kratos

+2 votes

1 answer

A certain nucleus has a mass number 20 and atomic number 9. Find the number of neutrons and protons present in it.

asked Mar 13, 2019 in Class 10 by kratos

+1 vote

1 answer

There is a ***** spot on a body. If the body is heated & carried in dark room, then it glows more. This can be explained by:

asked Mar 12, 2019 in Physics by kratos

+1 vote

1 answer

A radioactive nucleus ‘A’ undergoes a series of decays according to the following scheme:

asked Mar 10, 2019 in Class 12 by kratos

+3 votes

1 answer

A fluorescent tube is preferred to an electric bulb because

asked Mar 9, 2019 in Class 12 by kratos

+2 votes

1 answer

Which of the following statements is always true for neutron-induced fission reactions involving 235,92U?

asked Mar 5, 2019 in Physics by kratos

+1 vote

1 answer

The number of electrons in a neutral atom of an element is equal to its:

asked Mar 5, 2019 in Chemistry by kratos

+1 vote

1 answer

β rays deflected in A) Gravitational; field

asked Mar 3, 2019 in Class 12 by kratos

+2 votes

1 answer

Define thermionic emission.

asked Mar 1, 2019 in Class 12 by kratos

+1 vote

1 answer

Two radioactive nuclei are represented by xA^p and yA^q and when p and q are mass numbers and x, y are the atomic number.

asked Feb 26, 2019 in Class 10 by kratos

+3 votes

1 answer

A radioactive substance is oxidized will there be any change in the nature of its radioactivity?

asked Feb 24, 2019 in Physics by kratos

+3 votes

1 answer

Two ******** Ramesh (on path ARB) and Sohan (on path ASB), travel down slides of identical height h but different shapes as shown.

asked Feb 24, 2019 in Class 10 by kratos

+3 votes

1 answer

From α, β and γ-rays, name the one which travels with the speed of light?

asked Feb 19, 2019 in Class 10 by kratos

+3 votes

1 answer

What are beta rays and gamma rays?

asked Feb 17, 2019 in Class 10 by kratos

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