All Problems

Electric Oscillations

Problem 4.142

A coil and an inductance-free resistance \(R=25 \Omega\) are connected in parallel to the ac mains. Find the heat power generated in the coil provided a current \(I=0.90 \mathrm{~A}\) is drawn from the mains. The coil and the resistance \(R\) carry currents \(I_{1}=0.50 \mathrm{~A}\) and \(I_{2}=\) \(=0.60\) A respectively.

Reveal Answer
P1=1/2(I2−I12−I22)2R=2.5 WP_{1}=1 / 2\left(I^{2}-I_{1}^{2}-I_{2}^{2}\right)^{2} R=2.5 \mathrm{~W}
Prev
Next