Physics for Scientists & Engineers, Volume 2 (Chapters 21-35)
5th Edition
ISBN: 9780134378046
Author: GIANCOLI, Douglas
Publisher: PEARSON
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Chapter 30, Problem 8Q
To determine
The emf in the inductor has its maximum value even though the current is zero at the instant the battery is connected into the
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9 Figure 30-29 shows three circuits
with identical batteries, inductors,
Figure 30-28 Question 8.
and resistors. Rank the circuits,
greatest first, according to the current through the resistor labeled
R (a) long after the switch is closed, (b) just after the switch is
reopened a long time later, and (c) long after it is reopened.
R.
(1)
(2)
(3)
Figure 30-29 Question 9.
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A 10-mH inductor and a 25uF capacitor are connected in parallel. The combination is in series with a 15omega resistor and a 10V, 160Hz emf. (a) What is the current through the resistor? (b) What is the phase angle p (rho)
(II) At t=0 the current through a 45.0-mH inductor is50.0 mA and is increasing at the rate of 115 mA/s? What isthe initial energy stored in the inductor, and how long doesit take for the energy to increase by a factor of 5.0 from theinitial value?
Chapter 30 Solutions
Physics for Scientists & Engineers, Volume 2 (Chapters 21-35)
Ch. 30 - Prob. 1QCh. 30 - Prob. 2QCh. 30 - Prob. 3QCh. 30 - Prob. 4QCh. 30 - If you are given a fixed length of wire, how would...Ch. 30 - Prob. 6QCh. 30 - Prob. 7QCh. 30 - Prob. 8QCh. 30 - What keeps an LC circuit oscillating even after...Ch. 30 - In an ac LRC circuit, if XL XC, the circuit is...
Ch. 30 - Prob. 13QCh. 30 - Under what conditions is the impedance in an LRC...Ch. 30 - Is it possible for the instantaneous power output...Ch. 30 - In an ac LRC circuit, does the power factor, cos,...Ch. 30 - Describe briefly how the frequency of the source...Ch. 30 - Prob. 18QCh. 30 - In an LRC circuit, the current and the voltage in...Ch. 30 - Compare the oscillations or an LRC circuit to the...Ch. 30 - Prob. 4PCh. 30 - Prob. 28PCh. 30 - Prob. 29PCh. 30 - Prob. 30PCh. 30 - (II) (a) What is the rms current in a series LR...Ch. 30 - (I) What is the resonant frequency of the LRC...Ch. 30 - At time t = 0, the switch in the circuit shown in...Ch. 30 - Prob. 70GPCh. 30 - Show that the fraction of electromagnetic energy...
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- In Figure 14.12, =12V , L = 20 mH, and R=5.0. Determine (a) the time constant of the circuit, (b) the initial current through the resistor, (C) the final current through the resistor, (d) the current through the resistor when t=2L , and (e) the voltages across the inductor and the resistor when t=2L .arrow_forwardIn the simple RL circuit of Figure 14.12(b), can the emf induced across the inductor ever be greater than the emf of the battery used to produce the current?arrow_forwardA 5000-pF capacitor is charged to 100 V and then quickly connected to an 80-mH inductor. Determine (a) the maximum energy stored in the magnetic field of the inductor, (b) the peak value of the current, and (c) the frequency of oscillation of the circuit.arrow_forward
- The current I(t) through a 5.0-mH inductor varies with time, as shown below. The resistance of the inductor is 5.0 . Calculate the voltage across the inductor at t = 2.0 ms, r = 4.0 ms, and t = 8.0 ms.arrow_forwardWhen a camera uses a flash, a fully charged capacitor discharges through an inductor. In what time must the 0.100-A current through a 2.00-mH inductor be switched on or off to induce a 500-V emf?arrow_forwardIn an RLC series circuit, can the voltage measured across the capacitor be greater than the voltage of the source? Answer the same question for the voltage across the inductor.arrow_forward
- If emf of the battery of Figure 14.12(b) is reduced by a factor of 2, by how much does the steady-state energy stored in the magnetic field of the inductor change?arrow_forwardCheck Your understanding Suppose that the coil of Example 13.2 is a square rather than circular. Can Equation 13.12 be used to calculate (a) the induced emf and (b) the induced electric field? =EdI=dmdt13.12arrow_forwardWhen the current through a large inductor is interrupted with a switch, an are appears across the open terminals of the switch. Explain.arrow_forward
- The self-inductance of a coil is zero if there is no current passing through the windings. True or false?arrow_forward(L11) At t = 0 s, a 3.53E-3 H inductor carries a 5.03 A current flowing from a to b, as shown in the figure. The current then decreases at a constant rate until it becomes zero at t = 4.10 s. The voltage is measured to be Va at point a and V₁ at point b. What is the voltage difference Va-Vb between t = 0s and t = 4.10 s (in V; answer the sign and magnitude)? a فیقققق L elle I barrow_forward(I) How many turns of wire would be required to make a130-mH inductor out of a 30.0-cm-long air-filled solenoidwith a diameter of 5.8 cm?arrow_forward
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