# The Ideal Diode MCQ’s

This set of Electronic Devices & Circuits Multiple Choice Questions & Answers (MCQs) focuses on “The Ideal Diode”.

1. Consider an AC sine wave voltage signal being used to connect a diode and a resistor as shown in the figure. The variation of the voltage across the diode (Vd) with respect to time (t) is given by

a)

b)

c)
d) None of the mentioned

2. The figure below shows a circuit for charging a 12-V battery. If Vs is a sinusoid with 24-V peak amplitude, the fraction of each cycle during which the diode conducts is

a) One quarter of a cycle
b) One-third of a cycle
c) One half of the cycle
d) Three quarters of a cycle

3. For an ideal diode which of the following is true?
a) It allows the passage of current in the forward bias with zero potential drop across the diode
b) It does not allow the flow of current in reverse bias
c) All of the mentioned
d) None of the mentioned

4. Diodes can be used in the making of
a) Rectifiers
b) LED lamps
c) Logic gates
d) All of the mentioned

5. For the connections shown below, the equivalent logic gate is

a) OR gate
b) AND gate
c) XOR gate
d) NAND gate

6. The value of I and V for the circuit shown below are

a) 2A and 5V respectively
b) -2A and 5V respectively
c) -2A and -5V respectively
d) 2A and 0V respectively

7. For the connections shown below, the equivalent logic gate is

a) OR gate
b) AND gate
c) XOR gate
d) NAND gate

8. The figure below shows a circuit for an AC voltmeter. It utilizes a moving-coil meter that gives a full-scale reading when the average current flowing through it is 1 mA. The moving-coil meter has a 50-Ω resistance. The value of R that results in the meter indicating a full-scale reading when the input sine-wave voltage VI is 20 V peak-to-peak is

a) 3.183 kΩ
b) 3.133 kΩ
c) 3.183 Ω
d) 56.183 Ω

9. The units frequently used to measure the forward bias and reverse bias current of a diode are
a) µA and µA respectively
b) µA and mA respectively
c) mA and µA respectively
d) mA and mA respectively

10. A diode
a) Is the simplest of the semiconductor devices
b) Has a characteristic that closely follows that of a switch
c) Is two terminal device
d) All of the mentioned