PHYSICS F./SCI... W/MOD V.II W/KIT
4th Edition
ISBN: 9780134819884
Author: GIANCOLI
Publisher: PEARSON
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Question
Chapter 29, Problem 9P
To determine
The direction of the induced current in the loop when the solenoid is being pulled away from the loop.
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Students have asked these similar questions
Suppose you are looking at two wire loops in the plane
of the page as shown in Fig. 21–64. When switch S is closed
in the left-hand coil, (a) what is the direction of the induced
current in the other loop? (b) What is the situation after
a “long" time? (c) What is the direction of the induced
current in the right-hand loop if that loop is quickly pulled
horizontally to the right? (d) Suppose the right-hand loop
also has a switch like the left-hand loop. The switch in the
left-hand loop has been closed a long time when the switch
in the right-hand loop is closed. What happens in this case?
Explain each answer.
S
FIGURE 21-64
Problem 74.
(II) A 600-turn solenoid, 25 cm long, has a diameter of2.5 cm. A 14-turn coil is wound tightly around the center ofthe solenoid. If the current in the solenoid increases uniformly from 0 to 5.0 A in 0.60 s, what will be the induced emfin the short coil during this time?
II) For the electric power transmission system shown inFig. 21–25, what is the ratio for Ns/Np for (a) the step-up transformer, (b) the step-down transformer next to the home?
Chapter 29 Solutions
PHYSICS F./SCI... W/MOD V.II W/KIT
Ch. 29.1 - Return to the Chapter-Opening Question, page 758,...Ch. 29.2 - Prob. 1BECh. 29.3 - In what direction will the electrons now in Fig....Ch. 29.5 - A bicycle headlight is powered by a generator that...Ch. 29.7 - Prob. 1EECh. 29 - Prob. 1QCh. 29 - What is the difference between magnetic flux and...Ch. 29 - Suppose you are holding a circular ring of wire...Ch. 29 - Prob. 4QCh. 29 - Is there a force between the two loops discussed...
Ch. 29 - Suppose you are looking along a line through the...Ch. 29 - The battery mentioned in Question 6 is...Ch. 29 - Prob. 8QCh. 29 - Prob. 9QCh. 29 - In situations where a small signal must travel...Ch. 29 - What is the advantage of placing the two insulated...Ch. 29 - Prob. 12QCh. 29 - A region where no magnetic field is desired is...Ch. 29 - A cell phone charger contains a transformer. Why...Ch. 29 - An enclosed transformer has four wire leads coming...Ch. 29 - The use of higher-voltage lines in homessay, 600 V...Ch. 29 - Prob. 17QCh. 29 - Prob. 18QCh. 29 - Prob. 19QCh. 29 - Will an eddy current brake (Fig. 2921) work on a...Ch. 29 - It has been proposed that eddy currents be used to...Ch. 29 - The pivoted metal bar with slots in Fig. 2935...Ch. 29 - If an aluminum sheet is held between the poles of...Ch. 29 - A bar magnet falling inside a vertical metal tube...Ch. 29 - A metal bar, pivoted at one end, oscillates freely...Ch. 29 - Since a magnetic microphone is basically like a...Ch. 29 - Prob. 1PCh. 29 - (I) The north pole of the magnet in Fig. 2936 is...Ch. 29 - Prob. 3PCh. 29 - (I) A 22.0-cm-diameter loop of wire is initially...Ch. 29 - Prob. 5PCh. 29 - (II) A 10.8-cm-diameter wire coil is initially...Ch. 29 - (II) A 16-cm-diameter circular loop of wire is...Ch. 29 - (II) (a) If the resistance of the resistor in Fig....Ch. 29 - Prob. 9PCh. 29 - (II) The magnetic field perpendicular to a...Ch. 29 - (II) A circular loop in the plane of the paper...Ch. 29 - (II) Part of a single rectangular loop of wire...Ch. 29 - (II) While demonstrating Faradays law to her...Ch. 29 - Prob. 14PCh. 29 - (II) A 22.0-cm-diameter coil consists of 28 turns...Ch. 29 - (II) A power line carrying a sinusoidally varying...Ch. 29 - (II) The magnetic field perpendicular to a single...Ch. 29 - Prob. 18PCh. 29 - (II) A 25-cm-diameter circular loop of wire has a...Ch. 29 - (II) The area of an elastic circular loop...Ch. 29 - Prob. 21PCh. 29 - Prob. 22PCh. 29 - Prob. 23PCh. 29 - (II) Inductive battery chargers, which allow...Ch. 29 - Prob. 25PCh. 29 - Prob. 26PCh. 29 - (I) The moving rod in Fig. 2912b is 13.2 cm long...Ch. 29 - (I) The moving rod in Fig. 2912b is 12.0 cm long...Ch. 29 - Prob. 29PCh. 29 - (II) If the U-shaped conductor in Fig. 2912a has...Ch. 29 - (II) Suppose that the U-shaped conductor and...Ch. 29 - (II) When a car drives through the Earths magnetic...Ch. 29 - Prob. 33PCh. 29 - Prob. 34PCh. 29 - (III) A short section of wire, of length a, is...Ch. 29 - (I) The generator of a car idling at 875-rpm...Ch. 29 - Prob. 37PCh. 29 - (II) A simple generator has a 480-loop square coil...Ch. 29 - (II) Show that the rms output of an ac generator...Ch. 29 - (II) A 250-loop circular armature coil with a...Ch. 29 - Prob. 41PCh. 29 - (I) A motor has an armature resistance of 3.05 ....Ch. 29 - (II) What will be the current in the motor of...Ch. 29 - (II) The back emf in a motor is 85 V when the...Ch. 29 - Prob. 45PCh. 29 - (I) A transformer has 620 turns in the primary...Ch. 29 - (I) Neon signs require 12 kV for their operation....Ch. 29 - (II) A model-train transformer plugs into 120-V ac...Ch. 29 - (II) The output voltage of a 75-W transformer is...Ch. 29 - (II) If 65 MW of power at 45 kV (rms) arrives at a...Ch. 29 - Prob. 51PCh. 29 - (III) Design a dc transmission line that can...Ch. 29 - (III) Suppose 85 kW is to be transmitted over two...Ch. 29 - Prob. 54PCh. 29 - (II) The betatron, a device used to accelerate...Ch. 29 - (III) Show that the electrons in a betatron,...Ch. 29 - (III) Find a formula for the net electric field in...Ch. 29 - Prob. 58GPCh. 29 - A square loop 27.0 cm on a side has a resistance...Ch. 29 - Power is generated at 24 kV at a generating plant...Ch. 29 - Prob. 61GPCh. 29 - Prob. 62GPCh. 29 - A pair of power transmission lines each have a...Ch. 29 - Show that the power loss in transmission lines,...Ch. 29 - A high-intensity desk lamp is rated at 35 W but...Ch. 29 - Prob. 66GPCh. 29 - A coil with 150 turns, a radius of 5.0 cm, and a...Ch. 29 - A search coil for measuring B (also called a flip...Ch. 29 - A ring with a radius of 3.0 cm and a resistance of...Ch. 29 - A flashlight can be made that is powered by the...Ch. 29 - A small electric car overcomes a 250-N friction...Ch. 29 - What is the energy dissipated as a function of...Ch. 29 - A thin metal rod of length rotates with angular...Ch. 29 - The magnetic field of a shunt-wound dc motor is...Ch. 29 - Prob. 75GPCh. 29 - A circular metal disk of radius R rotates with...Ch. 29 - What is the magnitude and direction of the...Ch. 29 - Prob. 78GPCh. 29 - Prob. 79GPCh. 29 - Prob. 80GP
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- (I) If the current to a motor drops by 12%, by what factordoes the output torque change?arrow_forward(i) Calculate the magnitude of the induced current in the circuit. (ii) State the direction of induced current in the metal bar.arrow_forward(a) A wire loop is pulled away from a current-carrying wire (Fig. 21–47). What is the direction of the induced current in the loop: clockwise or counterclockwise? (b) What if the wire loop stays fixed as the current I decreases? Explain your answers. FIGURE 21-47 Question 4.arrow_forward
- (ii) A pair of adjacent coils has a mutual inductance of 1.5 H. If the current in one coil changes from 0 to 20 A in 0.5 s, what is the change of flux linkage with the other coil ?arrow_forward(I) The north pole of the magnet in Fig. 21–57 is being inserted into the coil. In which direc- tion is the induced current N flowing through resistor R? Explain. FIGURE 21-57 Problem 2. Rarrow_forward(c) A solenoid of length 8 x 10-2m and cross sectional area 5 x 10-5 m-2 contains 6500 turns per meter length. Calculate the self-inductance of the solenoid.arrow_forward
- (II) A 550-loop circular armature coil with a diameter of8.0 cm rotates at 120 rev/s in a uniform magnetic field ofstrength 0.55 T. (a) What is the rms voltage output of thegenerator? (b) What would you do to the rotation frequency in order to double the rms voltage output?arrow_forward(III) A 22.0-cm-diameter coil consists of 30 turns of circular copper wire 2.6 mm in diameter. A uniform magnetic field, perpendicular to the plane of the coil, changes at a rate of 8.65 x10-3 T/sDetermine (a) the current in the loop, and (b) the rate at which thermal energy is produced.arrow_forward(II) (a) If the resistance of the resistor in Fig. 21-60 is slowly increased, what is the direction of the current induced in the small circular loop inside the larger loop? (b) What would it be if the small loop were placed outside the larger one, to the left? Explain your answers. FIGURE 21-60 Problem 8.arrow_forward
- (III) A simple generator has a square armature 6.0 cm on aside. The armature has 85 turns of 0.59-mm-diametercopper wire and rotates in a 0.65-T magnetic field. Thegenerator is used to power a lightbulb rated at 12.0 V and25.0 W. At what rate should the generator rotate toprovide 12.0 V to the bulb? Consider the resistance of thewire on the armaturearrow_forward(II) A coil has 2.25 Ω resistance and 112-mH inductance.If the current is 3.00 A and is increasing at a rate of 3.80 A/swhat is the potential difference across the coil atthis moment?arrow_forward(2). A circular coil has 0.3 m diameter with 30 turns of wire, lies in a horizontal plane. It carries a current of 30 A in a counterclockwise sense when viewed from above. The coil is in a uniform magnetic field directed toward the right as shown in the Fig. with magnitude of 14000 G. Calculate,arrow_forward
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