Match List I with List II

List I
(Volt-ampere characteristics of tunnel diode)

List II
(Observation)

(a) At peak current I_pcorresponding to V_p

(i) Resistance becomes and remains positive

(b) If voltage increase beyond V_p

(ii) Current reaches I_p (peak current) and increase

(c) When voltage is just more than valley voltage

(iii) \(\frac{dI}{dV}\) is negative

(d) when voltage is more than peak forward voltage

(iv) Slope \(\frac{dI}{dV}\) is zero

Choose the correct answer from the option given below:

Question

Question

This question was previously asked in

UGC NET Paper 2: Electronic Science Nov 2020 Official Paper

Answer 1

Concept:

V – I characteristics of tunnel diode:

At peak current IP:

\(\frac{{dI}}{{dV}} = 0\)

Beyond the voltage V_p:

\(\frac{dI}{dV}\) is negative

When the voltage is more than the valley point, the resistance becomes positive and remains positive.

∴ Item (d) in List I does not match with any item in List II, i.e.

a – (iv) b – (iii) c – (i)

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List I (Volt-ampere characteristics of tunnel diode)	List II (Observation)
(a) At peak current I_pcorresponding to V_p	(i) Resistance becomes and remains positive
(b) If voltage increase beyond V_p	(ii) Current reaches I_p (peak current) and increase
(c) When voltage is just more than valley voltage	(iii) \(\frac{dI}{dV}\) is negative
(d) when voltage is more than peak forward voltage	(iv) Slope \(\frac{dI}{dV}\) is zero