Question

# When a potential difference is applied across, the current passing through :

A
An insulator at 0 K is zero
B
A semiconductor at 0 K is zero
C
A p-n diode at 300 K is finite, if its is reverse biased
D
None of these

Solution

## The correct options are A A semiconductor at $$0$$ K is zero B A p-n diode at $$300$$ K is finite, if its is reverse biased D An insulator at $$0$$ K is zeroThe resistivity of the insulator is inversely proportional to the temperature$$\rho \propto \dfrac{1}{T}$$So, an insulator at 0K is zeroThe resistance of semiconductor is directly proportional to the resistivity$$R\propto \rho$$ In reverse bias at $$300K$$ through a P-N junction diode, a small current flows due to minority charge carriers.The correct option are A, B and C.Physics

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