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# GATE 2023 Power Electronics Quiz 59

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Question 1

A single-phase voltage controller has input of 180 V, 50 Hz and a load . For five cycle ON and three cycle OFF. Find the load power?

Question 2

For the given circuit, what is the range of firing angle for which, output voltage is not controlled.

Question 3

A 1-ϕ Full wave AC voltage controller feeds a load of R = 10 Ω with an input voltage of 220 V, 50 Hz. Firing angle for both the thyristor is 60°. Calculate the RMS value of current across thyristor (in A).

Question 4

A 60 Hz, Single phase full wave AC Voltage controller feeds an RL load. The load is having the R = 6 Ω and L = 16 mH. The output is fully controllable for the range of ‘α’ (firing angle) is

Question 5

A single-phase voltage controller has input voltage of 220 V, 50 Hz and a load of R = 20 Ω. For 6 cycles on and 4 cycles off. Determine (a) RMS output voltage (b) Input power factor.

Question 6

A 1-ϕ voltage controller has input voltage of 200 V, 50 Hz and the load of R = 12Ω for 4 cycle ON and 5 cycle OFF. Find the RMS value of thyristor current (in A)?
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