Question: If the current on a 10 F capacitor is described by
If the current on a 10-μF capacitor is described by I = (120 A) sin (120πt + π/2), explain why the instantaneous voltage across it at t = 0 is zero whereas the cur-rent at that time is not.
Answer to relevant QuestionsWhat are the peak and rms voltages of a 120-V ac line and a 240-V ac line? The current and voltage outputs of an operating ac generator have peak values of 2.5 A and 16 V, respectively. (a) What is the average power output of the generator? (b) What is the effective resistance of the circuit it ...A single 50-mH inductor forms a complete circuit when connected to an ac voltage source at 120 V and 60 Hz. (a) What is the inductive reactance of the circuit? (b) How much current is in the circuit? (c) What is the phase ...An inductor is connected to a variable-frequency ac voltage source. (a) If the frequency decreases by a factor of 2, the rms current will be (1) 2, (2) 1/2, (3) 4, (4) 1/4times the original rms current. Why? (b) If the rms ...(a) An RLC series circuit is in resonance. Which one of the following can you change without upsetting the resonance: (1) resistance, (2) capacitance, (3) inductance, or (4) frequency? (b) A resistor, an inductor, and a ...
Post your question