PhysicsHardHigh School (11–12)Electricity & Magnetism › Alternating CurrentNEETAEEE (Amrita)AMUEEEAP EAPCETBCECECMI Entrance
Created by StemPy LabA resistor, an inductor and a capacitor are joined in series to a source of fixed rms voltage and variable frequency. The resistance is small. Two statements about the arrangement are given below. Statement I: At resonance, the rms voltage across the inductor can be larger than the rms voltage of the source. Statement II: Below the resonant frequency the current leads the source voltage, and above it the current lags the source voltage.
← All Quizzes
← A heater coil of resistance 5.0 Ω carries a current i = (2.0 + 8.0 sinω t) A: a steady part with an alternating part added to it. Take the average over a whole number of cycles. All the energy is dissipated as heat. The rms value of a current is the steady current that would give the same average heating. What is the average power dissipated in the coil?An alternating voltage is applied to each arrangement below, and R is the resistance of the resistor. Match each arrangement with its power factor. List-I (Arrangement) A. A pure resistor B. A pure capacitor C. A resistor R in series with an inductor of reactance XL = R D. A resistor R in series with a capacitor of reactance XC = √3 R List-II (Power factor) I. 1/2 II. 0 III. 1 IV. 1/√2 →
Discussion (0)
Log in to join the discussion.
Loading…