Which of the diode circuits shows correct biasing used for the… | JEE Main 2024 (4 Apr, Shift 2)

Q43JEE Main 2024 · 4 APR · SHIFT 2Medium

P-N Junction Diode

Which of the diode circuits shows correct biasing used for the measurement of dynamic resistance of p-n junction diode:

Show answer and solution

Answer: (d)

Dynamic resistance $r_d = \Delta V / \Delta I$ is measured in forward bias, so the battery positive must reach the anode.
(a) Positive (long) plate is on the grounded side, so $D_4$ is reverse biased. (b) Short (negative) plate on top: $D_1$ reverse biased.
(c) Two equal plates form a capacitor, not a cell: no steady bias.
(d) Long (positive) plate on top feeds $5\text{ V}$ through $R$ to the anode of $D_2$ : forward biased.
So the answer is (d).

More questions on P-N Junction Diode

What is the current in the following junction diode circuit?MHT CET 2024 (15 May, Shift 2)
Two ideal diodes are connected to a battery as shown in the circuit. The current supplied…MHT CET 2024 (10 May, Shift 1)
For the diagram shown, the resistance between points A and B when the ideal diode ' D '…MHT CET 2024 (9 May, Shift 1)
Find the magnitude of current in the given circuit.MHT CET 2024 (3 May, Shift 1)
The value of net resistance of the network as shown in the given figure is:JEE Main 2024 (4 Apr, Shift 1)
In the given circuit, the voltage across load resistance (R L) is:JEE Main 2024 (30 Jan, Shift 2)
On increasing the reverse bias to a large value in a P-N junction diode, currentMHT CET 2023 (13 May, Shift 1)
In which figure, the junction diode is forward biased?MHT CET 2023 (12 May, Shift 2)