MCQOPTIONS
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MCQOPTIONS
This section includes 8 Mcqs, each offering curated multiple-choice questions to sharpen your Electronic Devices Circuits knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
IF_THE_PEAK_VOLTAGE_ON_A_CENTRE_TAPPED_FULL_WAVE_RECTIFIER_CIRCUIT_IS_5V_AND_DIODE_CUT_IN_VOLTAGE_IS_0.7._THE_PEAK_INVERSE_VOLTAGE_ON_DIODE_IS_________?$ |
| A. | 4.3V |
| B. | 9.3V |
| C. | 5.7V |
| D. | 10.7V |
| Answer» C. 5.7V | |
| 2. |
In_a_centre_tapped_full_wave_rectifier,_the_input_sine_wave_is_250sin100t._The_output_ripple_frequency_will_be__________$ |
| A. | 50Hz |
| B. | 100Hz |
| C. | 25Hz |
| D. | 200Hz |
| Answer» C. 25Hz | |
| 3. |
Transformer utilization factor of a centre tapped full wave rectifier is_________ |
| A. | 0.623 |
| B. | 0.678 |
| C. | 0.693 |
| D. | 0.625 |
| Answer» D. 0.625 | |
| 4. |
If input frequency is 50Hz for a full wave rectifier, the ripple frequency of it would be _________ |
| A. | 100Hz |
| B. | 50Hz |
| C. | 25Hz |
| D. | 500Hz |
| Answer» B. 50Hz | |
| 5. |
A full wave rectifier uses load resistor of 1500Ω. Assume the diodes have Rf=10Ω, Rr=∞. The voltage applied to diode is 30V with a frequency of 50Hz. Calculate the AC power input.$ |
| A. | 368.98mW |
| B. | 275.2mW |
| C. | 145.76mW |
| D. | 456.78mW |
| Answer» C. 145.76mW | |
| 6. |
A full wave rectifier delivers 50W to a load of 200Ω. If the ripple factor is 2%, calculate the AC ripple across the load.$ |
| A. | 2V |
| B. | 5V |
| C. | 4V |
| D. | 1V |
| Answer» B. 5V | |
| 7. |
A full wave rectifier supplies a load of 1KΩ. The AC voltage applied to diodes is 220V (rms). If diode resistance is neglected, what is the ripple voltage?$ |
| A. | 0.562V |
| B. | 0.785V |
| C. | 0.954V |
| D. | 0.344V |
| Answer» D. 0.344V | |
| 8. |
Efficiency of a centre tapped full wave rectifier is _________ |
| A. | 50% |
| B. | 46% |
| C. | 70% |
| D. | 81.2% |
| Answer» E. | |