Aseries circuit consists of a 50-hz ac source, a 40-ω resistor, a 0.30-h inductor, and a 60-μf capacitor. the rms current in the circuit is measured to be 1.6 a. what is the power factor of the circuit?

0.7

Explanation:

f = 50 hz, R = 40 ohm, L = 0.3 h, C = 60 uC = 60 x 10^-6 c

XL = 2 x 3.14 x f x L = 2 x 3.14 x 50 x 0.3 = 94.2 ohm

Xc = 1 / ( 2 x 3.14 x 50 x 60 x 10^-6) = 53.078 ohm

Impedance is Z.

Z^2 = R^2 + ( XL - Xc)^2

Z^2 = 40^2 + (94.2 - 53.078)^2

Z^2 = 1600 + 1691.019

Z = 57.37 ohm

The power factor is given by

CosФ = r / Z = 40 / 57.37 = 0.697 = 0.7

this means that the temperature of both substances will be equal

wavelength divides in half and speed stays the same.