Class 4 (4th Engineer) MET 📅 May 2024

Exam Question

(a) Explain about non-linear resistors with some examples and illustration on how they differ from linear resistor. (6)

(b) A half-wave rectifier is used to supply 50V d.c. to a resistive load of 800Ω. The diode has a resistance of 25 Ω. Calculate a.c. voltage required. (10)

Reference Answer

### (a) Explanation of Non-Linear Resistors and their Distinction from Linear Resistors
To understand non-linear resistors, it is essential first to establish the characteristics of linear resistors.
#### 1. Linear Resistors
* **Definition**: A linear resistor is an electrical component designed to oppose the flow of electric current, where its resistance value remains constant irrespective of the voltage applied across it or the current flowing through it, within its operating limits.

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