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8-7

A 200 W light bulb is

powered from a 120 Vrms line voltage, and is switched on and off with a S4006LS SCR.


a.

  • Prove that the light bulb's nominal resistance is 72 Ω.

b.

  • When the SCR is on continuously, calculate the rms current through the light bulb.

c.

  • Calculate the maximum instantaneous voltage across the SCR when it is off.

d.

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