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steviespark
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Homework Statement
A triac is used in a dimmer switch to control a 100W light bulb. If the firing angle is set for α=∏/3 estimate the power dissipated in the bulb Rated at 100W and the voltage source 230V @ 50Hz.
Homework Equations
Vpeak = Vrms/0.707
The Attempt at a Solution
Vpeak = 230/0.707 = 325V
Vload = 325 * √((2∏-(2*∏/3) + sin(2∏/3))/4∏)
Vload = 206Vrms
100W = 230 * I
I = 100/230
I = 0.43A
power dissipated = 206 * 0.43 = 88.6 Watts
Could someone please let me know if I'm on the right track? Or give me a nudge in the right direction? Thanks in advance