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

An insulator at

0

K is zero

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

A semiconductor at

0

K is zero

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

A p-n diode at

300

K is finite, if its is reverse biased

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

None of these

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

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 zero
The resistivity of the insulator is inversely proportional to the temperature
$ρ \propto \frac{1}{T}$
So, an insulator at 0K is zero
The resistance of semiconductor is directly proportional to the resistivity
$R \propto ρ$
In reverse bias at $300 K$ through a P-N junction diode, a small current flows due to minority charge carriers.
The correct option are A, B and C.

Suggest Corrections

Similar questions

Q. Consider a p-n junction diode having the characteristic

i - i_{0} (e^{e V / k T} - 1) where i_{0} = 20 μA

. The diode is operated at T = 300 K. (a) Find the current through the diode when a voltage of 300 mV is applied across it in forward bias. (b) At what voltage does the current double?

In a p-n junction diode, the current I can be expressed as

where I₀ is called the reverse saturation current, V is the voltage across the diode and is positive for forward bias and negative for reverse bias, and I is the current through the diode, k_Bis the Boltzmann constant (8.6×10⁻⁵ eV/K) and T is the absolute temperature. If for a given diode I₀ = 5 × 10⁻¹²A and T = 300 K, then

(a) What will be the forward current at a forward voltage of 0.6 V?

(b) What will be the increase in the current if the voltage across the diode is increased to 0.7 V?

(d) What will be the current if reverse bias voltage changes from 1 V to 2 V?

Q. The conduction band of a solid is partially filled at 0 K. Will it be a conductor, a semiconductor or an insulator?

Draw V-I characteristics of a p-n junction diode. Answer the following questions, giving reasons :
(i) Why is the current under reverse bias almost independent of the applied potential upto a critical voltage?
(ii) Why does the reverse current show a sudden increase at the critical voltage?
Name any semiconductor device which operates under the reverse bias in the breakdown region.

Q. Find static and dynamic resistances of a PN junction germanium diode for an applied forward bias of

0.2

volts, if the temperature is

300^{o}

K and reverse saturation current of

1 A

Join BYJU'S Learning Program