Inv5.Exp2 Text

What happens to charges moving through a magnetic field?

• They experience a force.

• They remain stationary.

• They lose energy.

• They change direction randomly.

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

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

• By using a voltmeter to measure the current.

• By observing the color change in the wire.

• By measuring the temperature of the wire.

What rule is used to determine the direction of the force on a current-carrying wire?

• Right-hand rule

• Left-hand rule

• Thumb rule

• Index finger rule

What factors is the force on a current-carrying wire proportional to?

• Current, magnetic field, and length of wire in the field

• Voltage, resistance, and temperature

• Mass, velocity, and acceleration

• Frequency, amplitude, and wavelength

What causes rotational motion in an extended system with forces applied at different locations?

• Forces applied at different locations

• Uniform distribution of mass

• Constant temperature

• Equal distribution of charge

What is a lever arm in the context of a wire loop in a magnetic field?

• The distance from the axis of rotation to the point where the force is applied

• The length of the wire loop

• The width of the magnetic field

• The thickness of the wire

What results in a net torque causing a loop to rotate in a magnetic field?

• The orientation of the loop

• The color of the wire

• The temperature of the environment

• The material of the wire

What happens to the torque on a current-carrying loop when the lever arms are at their maximum?

• The torque is at its maximum.

• The torque is zero.

• The torque is at its minimum.

• The torque is constant.

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

• Electric motors

• Generators

• Transformers

• Capacitors

Which type of electric motor uses a direct current power source and electrically conductive brushes?

• Brushed direct current motor

• Induction motor

• Synchronous motor

• Stepper motor