Published by:
CGP EDU Academic Team
Published on: September 12, 2026
The rmoionic emission is the process in which electrons emit from solid surface, when it is heated up. According to Richardson current density through solid surface is given by J = AT 2 e –B/KT , Where, T = Temperature, K = Boltzman constant
(i) Calculate dimension of B –
Correct Matrix Matching
Text Solution
Verified by ExpertsThe correct answer is:
(i) Sol; (ii) Sol; (iii) Sol
Ans.
(i)
Sol. Dimension of 
The exponent of an exponential function must be dimensionless:
Therefore, 
Now, 
Hence, 
(ii)
Sol. Dimension of 
Current density:
From
(since the exponential term is dimensionless),
(iii)
Sol. Dimension of 
Now compare with the options:
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