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.

Click for More...

Tagged with:  

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.

Click for More...

Tagged with:  

Mastering Physics Solutions: Electric and Magnetic Field Vectors Conceptual Question

Mastering Physics Solutions: Electric and Magnetic Field Vectors Conceptual Question

On May 19, 2012, in Chapter 20: Electromagnetic Induction and Waves, by Mastering Physics Solutions

Part A = +z
Part B = -z
Part C = +y
Part D = at a –45° angle in the xz plane

The electric and magnetic field vectors at a specific point in space and time are illustrated. Based on this information, in what direction does the electromagnetic wave propagate?

Click for More...

Tagged with:  

Mastering Physics Solutions: A Magnet and a Coil

Mastering Physics Solutions: A Magnet and a Coil

On May 14, 2012, in Chapter 20: Electromagnetic Induction and Waves, by Mastering Physics Solutions

Part A = twice as great
Part B = unchanged

When a magnet is plunged into a coil at speed v, as shown in the figure, a voltage is induced in the
coil and a current flows in the circuit.
If the speed of the magnet is doubled, the induced voltage is?
The same magnet is plunged into a coil that has twice the number of turns as before. The magent
is shown before it enters the coil in the figure. If the speed of the magnet is again , the induced
current in the coil is?

Click for More...

Tagged with:  

Mastering Physics Solutions: Induced Current in a Metal Loop Conceptual Question

Mastering Physics Solutions: Induced Current in a Metal Loop Conceptual Question

On May 14, 2012, in Chapter 20: Electromagnetic Induction and Waves, by Mastering Physics Solutions

Part A = counterclockwise
Part B = counterclockwise
Part C = zero
Part D = zero
Part E = clockwise

For each of the actions depicted below, a magnet and/or metal loop moves with velocity v (v is constant and has the same magnitude in all parts). Determine whether a current is induced in the metal loop. If so, indicate the direction of the current in the loop, either clockwise or counterclockwise when seen from the right. The axis of the magnet is lined up with the center of the loop.

Click for More...

Tagged with:  

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.

Click for More...

Tagged with: