Analog Circuits Practice Test 1

1. In the given circuit input voltage V is 3V and V_B is 1V. The resistance R₁ and R₂ is 1K. Cut-in voltage of diode is 0.5V. Forward bias resistance is 10Ω. The current I will be
(Use piecewise linear model of diode)

2.13mA

1.56mA

1.23ma

0.96mA

2. What is meant by the PIV rating of a diode?

Maximum forward bias potential which can be applied across a diode without breakdown

Maximum power allowable to a diode

Maximum reverse bias potential which can be applied across a diode without breakdown

Minimum potential required by a diode to reach conduction state

3. Which of the following graph represents I-V characteristics of an ideal diode?

analog-circuits-interview-questions-answers-q1b

analog-circuits-interview-questions-answers-q1c

analog-circuits-interview-questions-answers-q1a

analog-circuits-interview-questions-answers-q1d

4. In the circuit shown below current I is 2mA and V_B is 1V. The resistor R is 1K. Cut-in voltage of diode is 0.7V. Forward bias resistance is 10Ω. The voltage V is __________

0.3V

5. Emission coefficient of Germanium is ___________

1.5

1.1

6. In ideal diode model diode in reverse bias is considered as a ___________

Perfect insulator

Perfect conductor

Capacitor

Resistor

7. Find current I through the circuit using characteristic equation of diode. The terminal voltage of each diode is 0.6V. Reverse saturation current is 10^-12A.

3.01mA

0.84mA

1.84mA

2.35mA

8. Voltage rating of a Zener diode denotes ____________

Reverse breakdown voltage

Forward breakdown voltage

Maximum forward voltage which a diode can withstand

Voltage at which current is maximum

9. In the circuit shown below voltage V_in is -3V and V_B is -1V. The resistor R₁ and R2 are 1K. Assume both diodes are identical. Forward bias resistance is 10Ω. Cut-in voltage of diode is 0.7V. The voltage V_out is __________

-1V

-2V

-.0.7V

-3V

10. Calculate the thermal voltage when the temperature is 25°C.

0.026V

0.25V