Home › GATE EE › Electrical Engineering › Electrical Circuits & Fundamentals › In a 3-phase transmission line, line voltage rms…
In a 3-phase transmission line, line voltage rms is 415 V. Phase voltage (Y/star) is:
A415 × √3
B415 V
C415/3
D415/√3 ≈ 240 V
Answer & Solution
Correct answer: D. 415/√3 ≈ 240 V
V_LL = √3 × V_ph (Y). 415/√3 = 240 V (phase to neutral). Indian LT supply: 415 V line-to-line 3-phase, 240 V phase-to-neutral. Single-phase appliances use 240 V (phase-neutral); industrial 3-phase motors use 415 V (line-line).
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: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:Diode allows current to flow: