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If a single diode in a center-tapped full wave rectifier opens, the output is
- A. 0 V
- B. half-wave rectified
- C. reduced in amplitude
- D. unaffected
- Correct Answer: Option B
In a semiconductor, the two bias conditions are
- A. positive and negative
- B. blocking and non-blocking
- C. open and closed
- D. forward and reverse
- Correct Answer: Option D
The voltage across a forward biased silicon diode is
- A. 0.7 V
- B. 0.3 V
- C. 0 V
- D. dependent of bias voltage
- Correct Answer: Option A
The rectification efficiency tells us what percentage of total input power is converted into useful dc power
- A. True
- B. False
- Correct Answer: Option A
The rectification frequency of a full-wave rectifier is
- A. 40%
- B. 40.6%
- C. 80%
- D. 81.2%
- Correct Answer: Option D
In a full-wave rectifier, the current in each of the diodes flows for
- A. the complete cycle
- B. half-cycle of the input signal
- C. less than half of the cycle
- D. zero time
- Correct Answer: Option B
In a half-wave rectifier, the load current flows for
- A. the complete cycle
- B. the positive half-cycle
- C. less than half of the cycle
- D. more than half-cycle but less than the complete cycle
- Correct Answer: Option B
The forward bias applied to a pn junction diode is increased from zero to higher values. Rapid increase of the current flow occurs when
- A. immediately
- B. only after the forward bias has exceeded the potential barrier
- C. when the flow of minority carriers is sufficient to cause an avalanche breakdown
- D. none of the above
- Correct Answer: Option B
When a pn junction is forward biased,
- A. only holes in the p region are injected into the n region
- B. only electrons in the n region are injected into the p region
- C. majority carriers from each region are injected into each other
- D. no carriers move
- Correct Answer: Option C
Avalanche breakdown occurs when
- A. forward current exceeds a certain value
- B. reverse bias exceeds a certain value
- C. forward bias exceeds a certain value
- D. the potential barrier is reduced to zero
- Correct Answer: Option B