Inv5.Exp2 Total Text (pg.213-224)

What experiences a force when moving through a magnetic field?

• A stationary magnet

• A stationary charge

• A moving charge

• A neutral atom

How can the force on a current-carrying wire be measured?

• By placing it between the opposite poles of two magnets attached to a scale

• By heating the wire

• By using a voltmeter

• By placing it in a vacuum

What rule is used to determine the direction of the magnetic field around a current-carrying wire?

• Fleming's law

• Left-hand rule

• Right-hand rule

• Thumb rule

What causes a wire loop in a magnetic field to experience torque?

• The temperature of the wire

• Forces acting on opposite sides in opposite directions

• The electrical resistance of the wire

• The uniformity of the magnetic field

What is the most common application of magnetically induced torque on wire loops?

• Magnetic resonance imaging (MRI)

• Electric motors

• Electric generators

• Transformers

According to the Biot-Savart law, what is the magnetic field proportional to?

• The length of the wire

• The current through the wire

• The temperature of the wire

• The resistance of the wire

What is a solenoid?

• A magnetic field sensor

• A type of electric motor

• A type of battery

• A long current-carrying wire wound into a helical coil

What is the primary use of solenoids?

• To produce electromagnets

• To produce light

• To measure electric current

• To generate heat

What sustains Earth's magnetic field?

• Electric currents in the fluid outer core

• Solar radiation

• The rotation of Earth around the Sun

• The presence of magnetic minerals in the crust

What is the result of wrapping a long piece of wire around a piece of pipe and attaching the wire ends to a battery?

• A transformer

• A solenoid

• A capacitor

• A resistor