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?

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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.

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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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Mastering Physics Solutions: Exercise 19.14

Mastering Physics Solutions: Exercise 19.14

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

Part A = 75000 m/s Click to use the calculator/solver for this part of the problem
Part B = 75000 Click to use the calculator/solver for this part of the problem

A charged particle travels undeflected through perpendicular electric and magnetic fields whose magnitudes are 3000 N/C and 40 mT, respectively.
Find the speed of the particle if it is a proton.
Find the speed of the particle if it is an alpha particle. (An alpha particle is a helium nucleus-a positive ion with a double positive charge of +2e.)

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