Discussion
Match the given list of devices with their respective application :
| List-I | List-II |
|---|---|
| (a) Diode | (i) Rectification |
| (b) Tunnel diode | (ii) Microwave switching |
| (c) Zener diode | (iii) Oscillator |
| (d) PIN diode | (iv) Voltage regulator |
Answer: A
The matching is a-i, b-iii, c-iv, d-ii. A diode is used for rectification. A tunnel diode shows negative resistance and is used in oscillators. A Zener diode keeps a steady voltage in reverse breakdown, so it serves as a voltage regulator. A PIN diode has a wide intrinsic region and works as a switch at microwave frequencies. Option (B) gives the tunnel diode as a regulator and the Zener as an oscillator. Option (C) gives the Zener diode as the oscillator. Option (D) gives the tunnel diode as a regulator, the Zener diode as a microwave switch and the PIN diode as an oscillator. Only (A) is right for all four.
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