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Chapter 31: 54P (page 938)
What is the maximum value of an ac voltage whose RMS value is 100 V?
The maximum value of an ac voltage is 141 V.
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The frequency of oscillation of a certain LCcircuit is. At time , plate Aof the capacitor has maximum positive charge. At what earliest time will
(a) plate Aagain have maximum positive charge,(b) the other plate of the capacitor have maximum positive charge, and (c) the inductor have maximum magnetic field?
What values of phase constant in Eq. 31-12 allow situations (a), (c), (e), and (g) of Fig. 31-1 to occur at ?
Figure 31-25 shows the currentand driving emf for a series RLC circuit. (a) Does the current lead or lag the emf? (b) Is the circuit’s load mainly capacitive or mainly inductive? (c) Is the angular frequency of the emf greater than or less than the natural angular frequency ?
An alternating source drives a series circuit with emf amplitude of, at a phase angle of. When the potential difference across the capacitor reaches its maximum positive value of, what is the potential difference across the inductor (sign included)?
In Fig. 31-33, a generator with an adjustable frequency of oscillation is connected to resistance , inductances and , and capacitances , , and . (a) What is the resonant frequency of the circuit? (Hint: See Problem 47 in Chapter 30.) What happens to the resonant frequency if (b) Ris increased, (c) is increased, and (d) is removed from the circuit?
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