Mastering Physics Solutions: A Wire and a Compass

Mastering Physics Solutions: A Wire and a Compass

On March 6, 2013, in Chapter 19: Magnetism, by Mastering Physics Solutions

Part A = It is smaller
Part B = It is larger

If the wire is lowered farther from the compass, how does the new angle of deflection of the north pole of the compass needle compare to its initial deflection?
With the wire back at its initial location, you connect a second identical battery in series with the first one. When you close the switch, how does the new angle of deflection of the north pole of the compass needle compare to its initial deflection?

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Mastering Physics Solutions: Magnetic Force on a Bent Wire Conceptual Question

Mastering Physics Solutions: Magnetic Force on a Bent Wire Conceptual Question

On March 3, 2013, in Chapter 19: Magnetism, by Mastering Physics Solutions

Part A = +y
Part B = 0
Part C = +x
Part D = -y
Part E = 0
Part F = -y
Part G = -x

The bent wire circuit shown in the figure is in a region of space with a uniform magnetic field in the +z direction.
Determine the direction of the magnetic force along segment 1, which carries current in the -x direction.
Determine the direction of the magnetic force along segment 2, which carries current in the -z direction.
etc.

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Mastering Physics Solutions: Current Sheet

Mastering Physics Solutions: Current Sheet

On February 23, 2013, in Chapter 19: Magnetism, by Mastering Physics Solutions

Part A = See the screenshot

Consider an infinite sheet of parallel wires. The sheet lies in the xy plane. A current l runs in the -y direction through each wire. There are N/a wires per unit length in the x direction.

Write an expression for B(d),the magnetic field a distance d above the xy plane of the sheet.

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Mastering Physics Solutions: Exercise 19.55

Mastering Physics Solutions: Exercise 19.55

On May 14, 2012, in Chapter 19: Magnetism, by Mastering Physics Solutions

Part A = repulsive
Part B = Since the currents flow in opposite directions, then due to the right hand rule, the magnetic field induced by one wire will be in an opposite direction to that of the other wire.
Part C = 10 μT Click to use the calculator/solver for this part of the problem
Part D = 50 μT/m Click to use the calculator/solver for this part of the problem

Two long, straight, parallel wires 10 cm apart carry currents in opposite directions.
Use the right-hand source and force rules to determine whether the forces on the wires are attractive or repulsive.
If the wires carry equal currents of 5.0 A, what is the magnetic field magnitude that each produces at the other’s location?
Use the result of part C to determine the magnitude of the force per unit length they exert on each other.

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Mastering Physics Solutions: Exercise 19.45

Mastering Physics Solutions: Exercise 19.45

On May 10, 2012, in Chapter 19: Magnetism, by Mastering Physics Solutions

Part A = to the right
Part B = 0.063 T Click to use the calculator/solver for this part of the problem

A solenoid is wound with 250 turns per centimeter. An outer layer of insulated wire with 200 turns per centimeter is wound over the solenoid’s first layer of wire. When the solenoid is operating, the inner coil carries a current of 10 A and the outer coil carries a current of 15 A in the direction opposite to that of the current in the inner coil.
What is the direction of the magnetic field at the center for this configuration?
What is the magnitude of the magnetic field at the center of the doubly wound solenoid?

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Mastering Physics Solutions: Exercise 19.38

Mastering Physics Solutions: Exercise 19.38

On May 10, 2012, in Chapter 19: Magnetism, by Mastering Physics Solutions

Part A = 0 T
Part B = 4.0*10^-6 Click to use the calculator/solver for this part of the problem

Two long, parallel wires separated by 60 cm each carry currents of 3.0 A in a horizontal direction.
Find the magnetic field midway between the wires if the currents are in the same direction.
Find if they are in opposite directions.

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