Diode Circuits MCQs

Question 1

When an SCR is turned on, the voltage across it is about

Accepted Answer

1 V

Answer

zero

Answer

10 V

Answer

0.1 V

Question 2

In a SCR circuit, the angle of conduction can be changed by

Accepted Answer

changing gate voltage

Answer

changing anode voltage

Answer

reverse biasing the gate

Answer

none of the above

Question 3

The values of voltage (VD) across a tunnel-diode corresponding to peak and valley currents are VP and Vv respectively. The range of tunnel-diode voltage VD kr which the slope of its I-VD characteristics is negative would be

Accepted Answer

Vp 5. VD < Vv

Answer

VD < 0

Answer

N/D<Vp

Answer

VD Vv

Question 4

Find the correct match between Group 1 and Group 2--Group 1-Group 2 E. Varactor diode-1. Voltage reference,F. PIN diode-2. High-frequency switch,G. Zener diode-3. Tuned circuits,H. Schottky diode-4. Current controlled attenuator

Accepted Answer

E -3, F -4, G - I, H -2

Answer

E - 4, F - 2, G - 1, H ? 3

Answer

E - 2, F - 4, G - 1, H ? 3

Answer

E - 1, F -3, G -2, H -4

Question 5

The correct full wave rectifier circuit is

Accepted Answer

the p+ n junction

Answer

the edge ofthe depletion region on the p-side

Answer

the edge of the depletion region on the n-side

Answer

the centre of the depletion region on the n-side

Question 6

For the Zener diode shown in the figure 2.16, the Zener voltage at knee is 7 V, the knee current is negligible and the Zener dynamic resistance is 10 12. If the input voltage (V1) range is from 10 to 16 V, the output voltage (V0) range from

Accepted Answer

7.14 to 7.43 V

Answer

7.00 to 7.29 V

Answer

7.14 to 7.29 V

Answer

7.29 to 7A3 V