6. Which one of the following is a Square law device ?
(a) Zener diode
(b) Crystal diode
(c) Tunnel diode
(d) Varactor diode
7. Match the given lists.
| List I | List II |
| (Name of the device) | (Application) |
| A. Diode | 1. Rectification |
| B. Tunnel diode | 2. Microwave switching |
| C. Zener diode | 3. As oscillator |
| D. PIN diode | 4. Voltage stabilization |
(a) A-1, B-3, C-4, D-2
(b) A-1, B-4, C-3, D-2
(c) A-1, B-2, C-4, D-3
(d) A-2, B-4, C-3, D-1
8. A PIN diode is :
(a) A metal semiconductor diode
(b) A microwave switch
(c) A microwave detector
(d) None of these
9. Tunnel diode is :
(a) Linear resistor
(b) Current dependent resistor
(c) Voltage dependent resistor
(d) Non-linear resistor
10. One of the following microwave diodes is suitable for very low power oscillators :
(a) Tunnel diode
(b) Gunn diode
(c) PIN diode
(d) Zener diode
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