NEET 2018 Physics question

Not in JEE Advanced syllabus

In a p-n junction diode, change in temperature due to heating

(1)Does not affect resistance of p-n junction
(2)Affects only forward resistance
(3)Affects only reverse resistance
(4)Affects the overall V - I characteristics of p-n junctionCorrect

Answer: (4)

Solution

On heating, more covalent bonds break in both the p and n regions, so the number of thermally generated electron-hole pairs (intrinsic carriers) increases. The minority-carrier concentration, and hence the reverse saturation current, rises steeply, and the width of the depletion region and the barrier potential

See the full step-by-step solution

Create a free account to read the complete working, and practise questions like this in a timed test.

Create a free account

Question ID VK-092210