Home › GATE EE › Electrical Engineering › Electrical Circuits & Fundamentals › Maximum power is transferred from source to load…
Maximum power is transferred from source to load when:
AR_L = ∞
BR_L = R_th (load matched to source's Thevenin resistance)
CR_L = 0
DR_L = 2 R_th
Answer & Solution
Correct answer: B. R_L = R_th (load matched to source's Thevenin resistance)
Maximum Power Transfer Theorem: for DC, P_max when R_L = R_th. Maximum power = V_th²/(4R_th). Efficiency = 50% at max power. AC: load impedance = complex conjugate of source impedance for max real power.
Related questions
For sinusoidal v(t) = V_m cos(ωt), peak-to-peak value:Two-wattmeter method measures 3-phase power. Total power:RL time constant:Energy density in magnetic field B is:In a 3-phase transmission line, line voltage rms is 415 V. Phase voltage (Y/star) is:Force on a current-carrying conductor of length l in magnetic field B (perpendicular):Full-wave bridge rectifier with input V_m sin(ωt), DC output:For a half-wave rectifier with input V_m sin(ωt), DC output (avg) is: