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In a single phase semi converter with resistive load and a firing angle α, each SCR and freewheeling diode would conduct for
  • a)
    α, 0°
  • b)
    π-α, α
  • c)
    π+α, α
  • d)
    π-α, 0°
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
In a single phase semi converter with resistive load and a firing angl...
FD does not come into the picture for resistive loads.
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In a single phase semi converter with resistive load and a firing angl...
The firing angle refers to the delay in turning on the thyristor in the semi-converter. It determines when the thyristor will start conducting and allow current to flow through the load.

In a single phase semi-converter with a resistive load, the thyristor is used to control the average voltage supplied to the load. By delaying the firing angle, the conduction angle of the thyristor is reduced, resulting in a lower average voltage across the load. This allows for control of the power delivered to the load.

The resistive load in this case refers to a load that only dissipates power in the form of heat, such as a heating element. The current flowing through the load is directly proportional to the voltage across it, and the power dissipated is given by P = I^2 * R, where P is the power, I is the current, and R is the resistance of the load.

By controlling the firing angle, the average voltage across the load can be adjusted, which in turn adjusts the current flowing through the load and therefore the power dissipated. This allows for control of the heating power in the resistive load.

Overall, in a single phase semi-converter with a resistive load and a firing angle, the firing angle determines when the thyristor turns on, controlling the average voltage across the load and consequently the power delivered to the load.
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In a single phase semi converter with resistive load and a firing angle α, each SCR and freewheeling diode would conduct fora)α, 0°b)π-α, αc)π+α, αd)π-α, 0°Correct answer is option 'D'. Can you explain this answer?
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