Physics (5th Edition)
5th Edition
ISBN: 9780134051802
Author: Walker
Publisher: PEARSON
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Textbook Question
Chapter 22, Problem 56PCE
It is desired that a solenoid 25 cm long and with 350 turns produce a magnetic field within it equal to the Earth’s magnetic field (5.0 × 10−5 T). What current is required?
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4.) The diagram shows the electric field lines of a positively charged conducting sphere of
radius R and charge Q.
A
B
Points A and B are located on the same field line.
A proton is placed at A and released from rest. The magnitude of the work done by the electric field in
moving the proton from A to B is 1.7×10-16 J. Point A is at a distance of 5.0×10-2m from the centre of
the sphere. Point B is at a distance of 1.0×10-1 m from the centre of the sphere.
(a) Explain why the electric potential decreases from A to B. [2]
(b) Draw, on the axes, the variation of electric potential V with distance r from the centre of the
sphere.
R
[2]
(c(i)) Calculate the electric potential difference between points A and B. [1]
(c(ii)) Determine the charge Q of the sphere. [2]
(d) The concept of potential is also used in the context of gravitational fields. Suggest why scientists
developed a common terminology to describe different types of fields. [1]
3.) The graph shows how current I varies with potential difference V across a component X.
904
80-
70-
60-
50-
I/MA
40-
30-
20-
10-
0+
0
0.5
1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
VIV
Component X and a cell of negligible internal resistance are placed in a circuit.
A variable resistor R is connected in series with component X. The ammeter reads 20mA.
4.0V
4.0V
Component X and the cell are now placed in a potential divider circuit.
(a) Outline why component X is considered non-ohmic. [1]
(b(i)) Determine the resistance of the variable resistor. [3]
(b(ii)) Calculate the power dissipated in the circuit. [1]
(c(i)) State the range of current that the ammeter can measure as the slider S of the potential divider
is moved from Q to P. [1]
(c(ii)) Describe, by reference to your answer for (c)(i), the advantage of the potential divider
arrangement over the arrangement in (b).
1.) Two long parallel current-carrying wires P and Q are separated by 0.10 m. The current in wire P is 5.0 A.
The magnetic force on a length of 0.50 m of wire P due to the current in wire Q is 2.0 × 10-s N.
(a) State and explain the magnitude of the force on a length of 0.50 m of wire Q due to the current in P. [2]
(b) Calculate the current in wire Q. [2]
(c) Another current-carrying wire R is placed parallel to wires P and Q and halfway between them as shown.
wire P
wire R
wire Q
0.05 m
0.05 m
The net magnetic force on wire Q is now zero.
(c.i) State the direction of the current in R, relative to the current in P.[1]
(c.ii) Deduce the current in R. [2]
Chapter 22 Solutions
Physics (5th Edition)
Ch. 22.1 - Is pole 1 in the bar magnet shown in Figure 22-7 a...Ch. 22.2 - Prob. 2EYUCh. 22.3 - A particle orbits in a magnetic field with a...Ch. 22.4 - The following systems consist of a...Ch. 22.5 - Two current-carrying loops are identical, except...Ch. 22.6 - Prob. 6EYUCh. 22.7 - Rank the following solenoids in order of...Ch. 22 - Two charged particles move at right angles to a...Ch. 22 - An electron moves with constant velocity through a...Ch. 22 - An electron moves with constant velocity through a...
Ch. 22 - Describe how the motion of a charged particle can...Ch. 22 - Explain how a charged particle moving in a circle...Ch. 22 - A current-carrying wire is placed in a region with...Ch. 22 - Predict/Explain Proton 1 moves with a speed v from...Ch. 22 - An electron moving in the positive x direction, at...Ch. 22 - Suppose particles A, B, and C in Figure 22-41 have...Ch. 22 - Referring to Figure 22-41, what is the sign of the...Ch. 22 - What is the acceleration of a proton moving with a...Ch. 22 - An electron moves at right angles to a magnetic...Ch. 22 - A negatively charged ion moves due north with a...Ch. 22 - Prob. 8PCECh. 22 - A 0.32-C particle moves with a speed of 16 m/s...Ch. 22 - A particle with a charge of 18C experiences a...Ch. 22 - An ion experiences a magnetic force of 6.2 1016 N...Ch. 22 - An electron moving with a speed of 4.0 105 m/s in...Ch. 22 - Predict/Calculate Two charged particles with...Ch. 22 - A 6.60-C particle moves through a region of space...Ch. 22 - Prob. 15PCECh. 22 - A velocity selector is to be constructed using a...Ch. 22 - Charged particles pass through a velocity selector...Ch. 22 - Prob. 18PCECh. 22 - Find the radius of the orbit when (a) an electron...Ch. 22 - BIO Predict/Calculate The artery in Figure 22-14...Ch. 22 - An electron accelerated from rest through a...Ch. 22 - A 10.2-C particle with a mass of 2.80 105 kg...Ch. 22 - Predict/Calculate When a charged particle enters a...Ch. 22 - A proton with a kinetic energy of 4.6 1016 J...Ch. 22 - Predict/Calculate An alpha particle (the nucleus...Ch. 22 - Prob. 26PCECh. 22 - Helical Motion As a model of the physics of the...Ch. 22 - What is the magnetic force exerted on a 2.35-m...Ch. 22 - A wire with a current of 2.1 A is at an angle of...Ch. 22 - The magnetic force exerted on a 1.2-m segment of...Ch. 22 - A 0.61 -m copper rod with a mass of 0.043 kg...Ch. 22 - The long, thin wire shown in Figure 22-45 is in a...Ch. 22 - A wire with a length of 3.8 m and a mass of 0.65...Ch. 22 - Loudspeaker Force The coil in a loudspeaker has 50...Ch. 22 - A high-voltage power line carries a current of 110...Ch. 22 - Prob. 36PCECh. 22 - For each of the three situations shown in Figure...Ch. 22 - A rectangular loop of 280 turns is 35 cm wide and...Ch. 22 - A single circular loop of radius 0.15 m carries a...Ch. 22 - In the previous problem, find the angle the plane...Ch. 22 - A square loop of wire 0.15 m on a side lies on a...Ch. 22 - Predict/Calculate Each of the 10 turns of wire in...Ch. 22 - Prob. 43PCECh. 22 - How much current must pass through a horizontal...Ch. 22 - You travel to the north magnetic pole of the...Ch. 22 - BIO Pacemaker Switches Some pacemakers employ...Ch. 22 - Two power lines, each 290 m in length, run...Ch. 22 - Predict/Calculate Consider the long, straight,...Ch. 22 - In Oersteds experiment, suppose that the compass...Ch. 22 - Prob. 50PCECh. 22 - Prob. 51PCECh. 22 - A loop of wire is connected to the terminals of a...Ch. 22 - Predict/Explain The number of turns in a solenoid...Ch. 22 - A circular coil of wire has a radius of 7.5 cm and...Ch. 22 - The solenoid for an automobile power door lock is...Ch. 22 - It is desired that a solenoid 25 cm long and with...Ch. 22 - A solenoid that is 72 cm long produces a magnetic...Ch. 22 - The maximum current in a superconducting solenoid...Ch. 22 - To construct a solenoid, you wrap insulated wire...Ch. 22 - CE A proton is to orbit the Earth at the equator...Ch. 22 - CE Figure 22-52 shows an electron beam whose...Ch. 22 - CE The three wires shown in Figure 22-53 are long...Ch. 22 - CE Each of the current-carrying wires in Figure...Ch. 22 - CE The four wires shown in Figure 22-54 are long...Ch. 22 - CE Each of the current-carrying wires in Figure...Ch. 22 - BIO Brain Function and Magnetic Fields Experiments...Ch. 22 - Credit-Card Magnetic Strips Experiments carried...Ch. 22 - Prob. 68GPCh. 22 - Prob. 69GPCh. 22 - CE A positively charged particle moves through a...Ch. 22 - CE A proton follows the path shown in Figure 22-56...Ch. 22 - CE Predict/Explain Suppose the initial speed of...Ch. 22 - BIO Magnetic Resonance Imaging An MRI (magnetic...Ch. 22 - Predict/Calculate A long, straight wire carries a...Ch. 22 - A particle with a charge of C moves with a speed...Ch. 22 - Predict/Calculate A beam of protons with various...Ch. 22 - Prob. 77GPCh. 22 - Repeat Problem 77 for the case where the current...Ch. 22 - Electric Motor A current of 2.4 A flows through a...Ch. 22 - Prob. 80GPCh. 22 - Lightning Bolts A powerful bolt of lightning can...Ch. 22 - Predict/Calculate Consider the two...Ch. 22 - Magnetars The astronomical object 4U014 + 61 has...Ch. 22 - Prob. 84GPCh. 22 - Solenoids produce magnetic fields that are...Ch. 22 - The current in a solenoid with 28 turns per...Ch. 22 - Prob. 87GPCh. 22 - Synchrotron Undulator In one portion of a...Ch. 22 - Predict/Calculate A single current-carrying...Ch. 22 - Prob. 90GPCh. 22 - A solenoid is made from a 25-m length of wire of...Ch. 22 - Magnetic Fields in the Bohr Model In the Bohr...Ch. 22 - A single-turn square loop carries a current of 18...Ch. 22 - Approximating a neuron by a straight wire, what...Ch. 22 - Suppose a neuron in the brain carries a current of...Ch. 22 - A given neuron in the brain carries a current of...Ch. 22 - A SQUID detects a magnetic field of 1.8 1014 T at...Ch. 22 - Predict/Calculate Referring to Example 22-7...Ch. 22 - Predict/Calculate Referring to Example 22-7...Ch. 22 - Referring to Quick Example 22-15 The current I1 is...Ch. 22 - Referring to Quick Example 22-15 The current I2 is...
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