Can an inductor oppose dc current? What about a capacitor? Explain each and why they are different.
Answer to relevant QuestionsIf 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. The current in a resistor is given by I = (8.0 A) sin (40πt) when a voltage given by V = (60 V) sin (40πt) is applied to it. (a) What is the resistance value? (b) What are the frequency and period of the voltage source? ...An ac circuit has an rms current of 5.0 A. What is the peak current? What is the average current? A circuit with a single capacitor is connected to a 120-V, 60-Hz source. (a) What is its capacitance if there is a current of 0.20 A in the circuit? (b) What would be the current if the source frequency were halved? In a series RLC circuit, R = XC = CL = 40-Ω for a particular driving frequency. (a) This circuit is (1) inductive, (2) capacitive, (3) in resonance. Explain your reasoning. (b) If the driving frequency is doubled, what ...
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