Q25. (I) Draw the energy band diagram for P-type semiconductor at (i) T=0K and (ii) room temperature

Q25. (I) Draw the energy band diagram for P-type semiconductor at (i) T=0K and (ii) room temperature.
(II)In the given diagram considering an ideal diode, in which condition will the bulb glow
(a) when the switch is open
(b) when the switch is closed
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