Physics
State the characteristics required of a good thermion emitter.
Radioactivity
ICSE 2016
14 Likes
Answer
The characteristics required of a good thermion emitter are :
- The work function of the substance should be low so that the electrons may be emitted from it even when it is not related to a high temperature.
- The melting point of the substance should be high so that it may not melt when it is heated to the temperature required for thermionic emitter.
Answered By
8 Likes
Related Questions
A music system draws a current of 400 mA when connected to a 12 V battery.
(i) What is the resistance of the music system?
(ii) The music system is left playing for several hours and finally the battery voltage drops and the music system stops playing when the current drops to 320 mA. At what battery voltage does the music system stop playing?
Calculate the quantity of heat produced in a 20 Ω resistor carrying 2.5 A current in 5 minutes.
An element ZSA decays to 85R222 after emitting 2 α particles and 1 β particle. Find the atomic number and atomic mass of the element S.
A radioactive substance is oxidized. Will there be any change in the nature of it's radioactivity? Give a reason for your answer.