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प्रश्न
In a cathode ray tube state the purpose of covering cathode by thorium and carbon.
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उत्तर
Purpose of covering cathode by thorium and carbon is to reduce its work function, decrease its melting point.
संबंधित प्रश्न
A radiation X is focused by a particular device on the bulb of a thermometer and mercury in the thermometer shows a rapid increase. Name the radiation X
Answer the following questions based on a hot cathode ray tube.
What will happen to the beam when it passes through the electric field?
State three factors on which the rate of emission of electrons from a metal surface depends
Why is a cathode ray tube evacuated to a low pressure?
Complete the diagram as given above by drawing the deflection of radioactive radiations in an electric field
State any two precautions to be taken while handling radioactive substances
Heavy radioactive elements eventually turn into ______.
A radioactive nucleus \[\ce{^A_ZX}\] undergoes spontaneous decay in the sequence \[\ce{^A_ZX -> _{Z-1 }B -> _{Z-3}C -> _{Z-2}D }\], where Z is the atomic number of element X. The possible decay particles in the sequence are ______.
When an α-particle of mass m moving with velocity ν bombards on a heavy nucleus of charge Ze, its distance of closest approach from the nucleus depends on m as:
