Diode and Rectifier

The static VI characteristics of a junction diode can be described by the equation called

• Child's three half-power law

• Boltzmann diode equation

• Einstein's photoelectric equation

• Richardson-Dushman equation

In a Zener diode with high breakdown voltage

• Both P and N are heavily doped

• Both P and N are lightly doped

• Either P or N is lightly doped

• None of the above

What is the primary function of a Zener diode in a circuit?

• Rectification

• Voltage regulation

• Signal amplification

• Current limiting

The ideal diode can be modeled as which of the following components?

• Open circuit in reverse bias

• Short circuit in forward bias

• Both A and B

• None of the above

In a half wave rectifier, the load current flows for what part of the cycle.

• 45

• 90

• 180

• 360

In a full wave rectifier, the current in each diode flows for

• whole cycle of the input signal

• half cycle of the input signal

• more than half cycle of the input signal

• none of these

In a full wave rectifier, if the input frequency is 50 Hz, then output frequency will be

• 50 Hz

• 75 Hz

• 100 Hz

• 200 Hz

In a centre tap full wave rectifier, if Vm is the peak voltage between the centre tap and one end of the secondary, the maximum voltage coming across the reverse bias diode is

• Vm

• 2Vm

• Vm/2

• Vm/Sqrt(2)

In a bridge type full wave rectifier, if Vm is the peak voltage across the secondary of the transformer, the maximum voltage coming across each reverse biased diode is

• Vm

• 2Vm

• Vm/2

• Vm/sqrt(2)

If the line frequency is 50 Hz, the output frequency of bridge rectifier is

• 25 Hz

• 50 Hz

• 100 Hz

• 200 Hz