Question

1. The d.c. resistance of a diode is .......
a) the same as it's a.c. resistance b) more than as it's a.c. resistance
c) less than as it's a.c. resistance d) zero​

Answer 1

Answer:

less than as it's a.c. resistance

Answer 2

correct question:

The d.c. resistance of a crystal diode is ________

a) the same as it's a.c. resistance b) more than as it's a.c. resistance

c) less than as it's a.c. resistance d) zero​

The d.c. resistance of a crystal diode is c) less than as it's a.c. resistance

less than as it's a.c. resistance:

• An inductor [L] and a capacitor [C] are connected in series in the Crystal equivalent Circuit.
• At all frequencies other than resonance, the impedance values of L and C change in opposite directions, resulting in the AC.
• There is more resistance. As a result, the conclusion is that DC resistance is lower.

Explanation for incorrect answer:

a) the same as it's a.c. resistance:

In a purely resistive circuit, AC resistance is the same as DC resistance. So it cannot be considered as the same as its a.c. resistance.

b) more than as it's a.c. resistance:

As the AC frequency rises, the current begins to flow towards the outer layers, not occupying the entire cross-section of the resistor, resulting in a smaller cross-section and higher resistance.

d) zero​:

.When an electronic component has zero resistance, it is fully conductive and has no internal resistance. So it cannot be considered as the same as its a.c. resistance.

Hence, A crystal diode's d.c. resistance is less than its a.c. resistance.