MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 6 Mcqs, each offering curated multiple-choice questions to sharpen your Power Electronics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A_single-phase_half-wave_thyristor_circuit_with_R_load_is_triggered_at_an_angle_of_α_=_0°._As_such,_the_maximum_value_of_the_average_output_voltage_would_be_given_by$# |
| A. | |
| B. | Vm |
| C. | 2Vm/π |
| Answer» D. | |
| 2. |
For a single phase thyristor circuit with R load & firing angle α, the conduction angle can be given b?# |
| A. | π+α |
| B. | 2π+α |
| C. | π-α |
| D. | α |
| Answer» D. ‚âà√≠¬¨¬± | |
| 3. |
In a single phase half-wave thyristor circuit with R load & Vs=Vm sinωt, the maximum value of the load current can be given by$ |
| A. | 2Vm/R |
| B. | Vs/R |
| C. | Vm/2 |
| D. | Vs/2 |
| Answer» D. Vs/2 | |
| 4. |
In the method of phase control, the phase relationship between ___ & ___ is controlled by varying the firing angle |
| A. | supply current, supply voltage |
| B. | end of the load current, end of the load voltage |
| C. | start of the load current, start of the load voltage |
| D. | load current, load voltage |
| Answer» D. load current, load voltage | |
| 5. |
The average output voltage is maximum when SCR is triggered at ωt =$ |
| A. | π |
| B. | 0 |
| C. | π/2 |
| D. | π/4 |
| Answer» C. ‚âà√¨‚àö√ë/2 | |
| 6. |
A voltage source Vs = Vm sinωt is connected in series with a resistance R and an SCR. At some firing angle delay of α a positive gate pulse is applied to the SCR which turns on the SCR. Considering ideal conditions, at the instant α the voltage at the resistor terminals Vo |
| A. | falls to zero |
| B. | falls to –Vm sin α |
| C. | rises to Vm sin α |
| D. | rises to Vm sin ωt |
| Answer» D. rises to Vm sin ‚âà√¨‚àö¬¢t | |