Two resistors

PHYSICS · Single correct · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

Two resistors, R1=30 ΩR_1 = 30\,\Omega and R2R_2, are connected one at a time to the same sinusoidal AC source whose rms voltage is constant. If the average power dissipated in R1R_1 is twice that in R2R_2, the value of R2R_2 is (a) 45 Ω45\,\Omega (b) 60 Ω60\,\Omega (c) 15 Ω15\,\Omega (d) 90 Ω90\,\Omega

Related theory

Browse the problem library