Rectifiers Objective Type Questions and Answers

(21) The advantages of mercury arc rectifier is that

[A] It is light in weight and occupies small floor space

[B] It has high efficiency

[C] It has high overload capacity

[D] All of the above

Answer: All of the above

(22) To produce cathode spot in a mercury arc rectified

[A] Anode is heated

[B] Tube is evacuated

[C] An auxiliary electrode is used

[D] Low mercury vapour pressures are used

Answer: An auxiliary electrode is used

(23) The ionization potential of mercury is approximately

[A] 5.4 V

[B] 8.8 V

[C] 10.4 V

[D] 16.4 V

Answer: 10.4 V

(24) Bridge rectifier is an alternative for

[A] Full wave rectifier

[B] Peak rectifier

[C] Half wave rectifier

[D] None of the mentioned

Answer: Full wave rectifier

(25) Which of the following is true for a bridge rectifier?

[A] The peak inverse voltage or PIV for the bridge rectifier is lower when compared to an identical center tapped rectifier

[B] The output voltage for the center tapped rectifier is lower than the identical bridge rectifier

[C] A transistor of higher number of coil is required for center tapped rectifier than the identical bridge rectifier

[D] All of the mentioned

Answer: All of the mentioned

(26) For a half wave or full wave rectifier the Peak Inverse Voltage of the rectifier is always

[A] Greater than the input voltage

[B] Smaller than the input voltage

[C] Equal to the input voltage

[D] Greater than the input voltage for full wave rectifier and smaller for the half wave rectifier

Answer: Smaller than the input voltage

Rectifiers Quiz | Rectifiers Objective Type Questions and Answers