EBK PHYSICS FOR SCIENTISTS AND ENGINEER
9th Edition
ISBN: 8220100663987
Author: Jewett
Publisher: Cengage Learning US
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Textbook Question
Chapter 33, Problem 33.57AP
A step-up transformer is designed to have an output voltage of 2 200 V (rms) when the primary is connected across a 110-V (rms) source. (a) If the primary winding has exactly 80 turns, how many turns are required on the secondary? (b) If a load resistor across the secondary draws a current of 1.50 A, what is the current in the primary, assuming ideal conditions? (c) What If? If the transformer actually has an efficiency of 95.0%, what is the current in the primary when the secondary current is 1.20 A?
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A transformer has 500 primary turns and 10 secondary turns. (a) If Vp is 120 V (rms), what is Vs with an open circuit? If the secondary now has a resistive load of 15 , what is the current in the (b) primary and (c) secondary?
A transformer is to be used to provide power for a computer disk drive that needs 5.0 V (rms) instead of the 120 V (rms) from the
wall outlet. The number of turns in the primary is 410, and it delivers 500 mA (the secondary current) at an output voltage of 5.0
V (rms).
(a) Should the transformer have more turns in the secondary compared to the primary, or fewer turns?
O There should be more turns in the secondary.
O There should be fewer turns in the secondary.
(b) Find the current in the primary.
| mA
(c) Find the number of turns in the secondary.
turns
A step-up transformer is designed to have an output voltage of 2 200 v (rms) when the primary is connected across a 110-V (rms) source.
(a) If the primary winding has exactly 70 turns, how many turns are required on the secondary?
turns
(b) If a load resistor across the secondary draws a current of 1.40 A, what is the current in the primary, assuming ideal conditions?
A
(c) If the transformer actually has an efficiency of 94.0%, what is the current in the primary when the secondary current is 1.20 A?
Chapter 33 Solutions
EBK PHYSICS FOR SCIENTISTS AND ENGINEER
Ch. 33 - Consider the voltage phasor in Figure 32.4, shown...Ch. 33 - Consider the AC circuit in Figure 32.8. The...Ch. 33 - Consider the AC circuit in Figure 32.11. The...Ch. 33 - Consider the AC circuit in Figure 32.12. The...Ch. 33 - Label each part of Figure 32.16, (a), (b), and...Ch. 33 - An AC source drives an RLC circuit with a fixed...Ch. 33 - What is the impedance of a series RLC circuit at...Ch. 33 - An inductor and a resistor are connected in series...Ch. 33 - (i) When a particular inductor is connected to a...Ch. 33 - A capacitor and a resistor are connected in series...
Ch. 33 - Prob. 33.4OQCh. 33 - Prob. 33.5OQCh. 33 - A sinusoidally varying potential difference has...Ch. 33 - A series RLCcircuit contains a 20.0- resistor, a...Ch. 33 - A resistor, a capacitor, and an inductor are...Ch. 33 - (a) Why does a capacitor act as a short circuit at...Ch. 33 - What is the plia.se angle in a series RLC circuit...Ch. 33 - Prob. 33.11OQCh. 33 - A 6.00-V battery is connected across the primary...Ch. 33 - Do AC ammeters and voltmeters read (a)...Ch. 33 - (a) Explain how the quality factor is related to...Ch. 33 - (a) Explain how the mnemonic ELI the ICE man can...Ch. 33 - Why is the sum of the maximum voltages across each...Ch. 33 - (a) Does the phase angle in an RLC series circuit...Ch. 33 - Prob. 33.5CQCh. 33 - As shown in Figure CQ33.6, a person pulls a vacuum...Ch. 33 - Prob. 33.7CQCh. 33 - Will a transformer operate if a battery is used...Ch. 33 - Prob. 33.9CQCh. 33 - Prob. 33.10CQCh. 33 - When an AC source is connected across a 12.0-...Ch. 33 - (a) What is the resistance of a lightbulb that...Ch. 33 - An AC power supply produces a maximum voltage Vmax...Ch. 33 - A certain lightbulb is rated at 60.0 W when...Ch. 33 - The current in the circuit shown in Figure P32.3...Ch. 33 - In the AC circuit shown in Figure P32.3, R = 70.0 ...Ch. 33 - An audio amplifier, represented by the AC I source...Ch. 33 - Figure P32.4 shows three lightbulbs connected to a...Ch. 33 - An inductor has a .54.0- reactance when connected...Ch. 33 - In a purely inductive AC circuit as shown in...Ch. 33 - Prob. 33.11PCh. 33 - An inductor is connected to an AC power supply...Ch. 33 - An AC source has an output rms voltage of 78.0 V...Ch. 33 - A 20.0-mH inductor is connected to a North...Ch. 33 - Review. Determine the maximum magnetic flux...Ch. 33 - The output voltage of an AC source is given by v =...Ch. 33 - A 1.00-mF capacitor is connected to a North...Ch. 33 - An AC source with an output rms voltage of 86.0 V...Ch. 33 - (a) For what frequencies does a 22.0-F capacitor...Ch. 33 - A source delivers an AC voltage of the form =...Ch. 33 - What maximum current is delivered by an AC source...Ch. 33 - A capacitor C is connected to a power supply that...Ch. 33 - What is the maximum current in a 2.20-F capacitor...Ch. 33 - An AC source with Vmax = 150 V and f = 50.0 Hz is...Ch. 33 - In addition to phasor diagrams showing voltages...Ch. 33 - A sinusoidal voltage = 40.0 sin 100t, where is...Ch. 33 - A series AC circuit contains a resistor, an...Ch. 33 - At what frequency does the inductive reactance of...Ch. 33 - An RLC circuit consists of a 150- resistor, a...Ch. 33 - Prob. 33.30PCh. 33 - An inductor (L = 400 mH), a capacitor (C = 4.43...Ch. 33 - A 60.0-ft resistor is connected in series with a...Ch. 33 - Review. In an RLC series circuit that includes a...Ch. 33 - Prob. 33.34PCh. 33 - A series RLC circuit has a resistance of 45.0 and...Ch. 33 - An AC voltage of the form = 100 sin 1 000t, where...Ch. 33 - A series RLC circuit has a resistance of 22.0 and...Ch. 33 - An AC voltage of the form v = 90.0 sin 350t, where...Ch. 33 - ln a certain series RLC circuit, Irms = 9.00 A,...Ch. 33 - Prob. 33.40PCh. 33 - Prob. 33.41PCh. 33 - A series RLC circuit has components with the...Ch. 33 - An RLC circuit is used in a radio to tune into an...Ch. 33 - The LC circuit of a radar transmitter oscillates...Ch. 33 - A 10.0- resistor, 10.0-mH inductor, and 100-F...Ch. 33 - A resistor R, inductor L, and capacitor C are...Ch. 33 - Review. A radar transmitter contains an LC circuit...Ch. 33 - A step-down transformer is used for recharging the...Ch. 33 - The primary coil of a transformer has N1 = 350...Ch. 33 - A transmission line that has a resistance per unit...Ch. 33 - In the transformer shown in Figure P33.51, the...Ch. 33 - A person is working near the secondary of a...Ch. 33 - The RC high-pass filter shown in Figure P33.53 has...Ch. 33 - Consider the RC high-pass filler circuit shown in...Ch. 33 - Prob. 33.55PCh. 33 - Consider the Filter circuit shown in Figure...Ch. 33 - A step-up transformer is designed to have an...Ch. 33 - Prob. 33.58APCh. 33 - Review. The voltage phasor diagram for a certain...Ch. 33 - Prob. 33.60APCh. 33 - Energy is to be transmitted over a pair of copper...Ch. 33 - Energy is to be transmitted over a pair of copper...Ch. 33 - A 400- resistor, an inductor, and a capacitor are...Ch. 33 - Show that the rms value for the sawtooth voltage...Ch. 33 - A transformer may be used to provide maximum power...Ch. 33 - A capacitor, a coil, and two resistors of equal...Ch. 33 - Marie Cornu, a physicist at the Polytechnic...Ch. 33 - A series RLC circuit has resonance angular...Ch. 33 - Review. One insulated conductor from a household...Ch. 33 - (a) Sketch a graph of the phase angle for an RLC...Ch. 33 - In Figure P33.71, find the rms current delivered...Ch. 33 - Review. In the circuit shown in Figure P32.44,...Ch. 33 - Prob. 33.73APCh. 33 - A series RLC circuit is operating at 2.00 103 Hz....Ch. 33 - A series RLC circuit consists of an 8.00-...Ch. 33 - A series RLC circuit in which R = l.00 , L = 1.00...Ch. 33 - The resistor in Figure P32.49 represents the...Ch. 33 - An 80.0- resistor and a 200-mH inductor are...Ch. 33 - Prob. 33.79CPCh. 33 - P33.80a shows a parallel RLC circuit. The...Ch. 33 - Prob. 33.81CP
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