PHYSICS F/SCI.+ENGINEERS W/MOD.PHYSICS
5th Edition
ISBN: 9780321992277
Author: GIANCOLI
Publisher: PEARSON
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Chapter 28, Problem 5P
To determine
Indicate the direction of the magnetic field vector at each of the points
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3. By using the fact that around any closed loop the sum of the EMFS = the sum of the PDs. Write
equations for the two loops shown in the cct below.
40
ΔΩ
I₂
4V
(loop1
20 (loop2) 2v
I+12
Use these equations to show that the current flowing through the 20 resistor is 0.75A
5. A potential divider circuit is made by stretching a 1 m long wire with a resistance of 0.1 per cm
from A to B as shown.
8V
A
100cm
B
sliding contact
5Ω
A varying PD is achieved across the 5 Q resistor by moving the slider along the resistance wire.
Calculate the distance from A when the PD across the 5 Q resistor is 6 V.
4. A voltmeter with resistance 10 kQ is used to measure the pd across the 1 kQ resistor in the circuit
below.
6V
5ΚΩ
1ΚΩ
V
Calculate the percentage difference between the value with and without the voltmeter.
Chapter 28 Solutions
PHYSICS F/SCI.+ENGINEERS W/MOD.PHYSICS
Ch. 28 - The magnetic field due to current in wires in your...Ch. 28 - Compare and contrast the magnetic field due to a...Ch. 28 - Two insulated long wires carrying equal currents I...Ch. 28 - Prob. 4QCh. 28 - (a) Write Ampres law for a path that surrounds...Ch. 28 - Use the Biot-Savart law to show that the field of...Ch. 28 - Prob. 9QCh. 28 - Why does twisting the lead-in wires to electrical...Ch. 28 - Compare the Biot-Savart law with Coulombs law....Ch. 28 - Will a magnet attract any metallic object, such as...
Ch. 28 - An unmagnetized nail will not attract an...Ch. 28 - Prob. 18QCh. 28 - Prob. 5PCh. 28 - (II) A third wire is placed in the plane of the...Ch. 28 - Prob. 18PCh. 28 - (II) Let two long parallel wires, a distance d...Ch. 28 - (II) Repeat Problem 19 if the wire at x = 0...Ch. 28 - Prob. 36PCh. 28 - (II) A wire, in a plane, has the shape shown in...Ch. 28 - (II) A circular conducting ring of radius R is...Ch. 28 - Prob. 40PCh. 28 - Prob. 56GPCh. 28 - A rectangular loop of wire carries a 2.0-A current...Ch. 28 - Prob. 60GPCh. 28 - A 175-g model airplane charged to 18.0 mC and...
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