Half Wave Rectifier MCQs : This section focuses on the "Half Wave Rectifier" in Semiconductor Devices. These Multiple Choice Questions (MCQs) should be practiced to improve the Semiconductor Devices skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.
A rectifier is a circuit which converts the _____________ input power into a ___________________ output power.
A. Direct Current (DC), Alternating Current (AC)
B. Alternating Current (AC), Direct Current (DC)
C. Both A and B
D. None of the above
Explanation: A rectifier is a circuit which converts the Alternating Current (AC) input power into a Direct Current (DC) output power.
The current on the DC side of the circuit flows in one direction only making the circuit?
B. No directional
D. None of the above
Explanation: The current on the DC side of the circuit flows in one direction only making the circuit Unidirectional.
The input power supply is?
D. Both A and B
Explanation: The input power supply may be either a single-phase or a multi-phase supply with the simplest of all the rectifier circuits being that of the Half Wave Rectifier.
Maximum efficiency of Half Wave Rectifier is?
Explanation: Maximum efficiency of Half Wave Rectifier is 41%.
Ripple factor of Half Wave Rectifier is:
Explanation: Ripple factor of Half Wave Rectifier is 1.21
Ripple factor is equal to?
A. Irms – Idc
B. Irms + Idc
C. Irms * Idc
D. Irms / Idc
Explanation: Ripple factor is equal to Irms / Idc.
If peak voltage for a half wave rectifier circuit is 5V and diode cut in voltage is 0.7, then peak inverse voltage on diode will be?
Explanation: PIV is the maximum reverse bias voltage that can be appeared across a diode in the given circuit, If the PIV rating is less than this value of breakdown of diode will occur. For a rectifier, PIV=Vm-Vd=5-0.7=4.3V.
Transformer utilisation factor of a half wave rectifier is _________
Explanation: Transformer utilisation factor is the ratio of AC power delivered to load to the DC power rating. This factor indicates effectiveness of transformer usage by rectifier. For a half wave rectifier, it’s low and equal to 0.287.
If the input frequency of a half wave rectifier is 100Hz, then the ripple frequency will be_________
A. 100 Hz
B. 200 Hz
C. 250 Hz
D. 300 Hz
Explanation: The ripple frequency of the output and input is same. This is because, one half cycle of input is passed and other half cycle is seized. So, effectively the frequency is the same.
During each positive half cycle of the AC sine wave, the diode is forward biased.
C. Can be true or false
D. Can not say
Explanation: True, During each positive half cycle of the AC sine wave, the diode is forward biased as the anode is positive with respect to the cathode resulting in current flowing through the diode.