Electronics

Carriers in n type

• Electrons

• Holes

• Positrons

• Neutrons

Rectification means

• Conversion of AC to DC

• Conversion of DC to AC

• Increasing amplitude

• Reversing phase

β is the ratio of

• Collector current to base current

• Collector current to emitter current

• Base current to emitter current

• Collector current to base current

Input of an oscillator is

• A DC signal

• AC signal

• No signal

• Pulse

For faith full amplification

• Input junction is to be forward biased

• Output junction is reverse biased

• Input junction is to be forward biased andOutput junction is reverse biased

• None

Phase difference in degree between input and output of a transistor amplifier is

• 180

• 90

• 360

• 270

Feedback used in an oscillator circuit is

• Negative

• Positive

• No feedback

Ripple factor is greater for

• Half wave rectifier

• Centre tap full wave rectifier

• Bridge type full wave rectifier

Theoretical efficiency of a full wave rectifier is

• 0.5

• 0.46

• 0.812

• 1

Op amp has

• Infinite gain

• Unit gain

• Double gain

• None of these