Diodes and rectifiers

what is a diodes function

• allows current to flow in one direction

• allows current to flow in two directions

• is a resistor

when a Diode is used as a half wave rectifier ....

• It rectifies only one half of the input AC signal

• It rectifies both the halves of the input AC signal

Which image shows the output of a sine-wave after it has gone through a diode? (Half-wave rectified)

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Which component of a circuit is used to measure current?

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The function of rectifier is

• To increase or decrease the AC voltage in a circuit

• Converting the AC voltage into pulse DC voltage

• Smooth out the ripple contained in the pulses of pulse DC voltage

• Maintain a constant DC voltage output across a load

The number of diodes used to build a bridge rectifier

• 1

• 2

• 3

• 4

The applied input a.c. power to a half-wave rectifier is 100 watts. The d.c. output power obtained is 40 watts. What is the rectification efficiency ?

• 40%

• 60%

• 80%

• 90%

Efficiency of a centre tapped full wave rectifier is _________

a) 50%

b) 46%

c) 70%

d) 81.2%

• 50%

• 46%

• 70%

• 81.2%

The two legs of the diode are ________________ and _______________

The voltage found in the depletion zone of a diode is...