What is the power dissipated in the resistor If you have a sinusoid waveform with 20vpp at 400hz?

Question

What is the power dissipated in the resistor If you have a sinusoid waveform with 20vpp at 400hz?

Answer 1

70.7 / value of resistor

Answer 2

RMS value of the sine wave is 0.707 x 10 = 7.07 volts. this is the heating equivalent voltage.

But I need either the current or resistance to go any further.

Answer 3

It depends on the resistance, RMS voltage of a sinusoid is peak value / √2 = 10v / 1.414 = 7.07v, Power = Voltage² / Resistance, so when you find out the resistance plug it in, for example the power dissipated in a 1k Ω (ohm) resistor will be 7.07²v / 1000 = 50 / 1000 = 0.05 Watts.