Inv5.Exp2 Text A

What happens when charges move through a magnetic field?

• They experience a gravitational force
• They experience an electric force
• They experience a magnetic force
• They remain unaffected

In a current-carrying wire placed in a magnetic field, what determines the direction of the force?

• The wire's resistance
• The right-hand rule
• The temperature of the wire
• The wire's diameter

When measuring the force on a current-carrying wire between two magnets, why is a scale used?

• To measure the wire's length
• To measure the magnetic field strength
• To indicate the amount of force on the wire
• To measure the current flow

The force on a current-carrying wire is proportional to which of the following?

• Current, magnetic field, and wire diameter
• Current, magnetic field, and wire resistance
• Current, magnetic field, and wire length
• Current, magnetic field, and wire temperature

Which part of the wire contributes to the magnetic force?

• The part parallel to the magnetic field
• The part perpendicular to the magnetic field
• The entire length regardless of orientation
• The insulated portion of the wire

What happens when a current travels through opposite sides of a wire loop in a magnetic field?

• Forces act in the same direction
• No forces are generated
• Forces act in opposite directions
• Forces cancel each other out completely

What is a lever arm in the context of a current-carrying loop?

• The total length of the wire
• The distance from the axis of rotation to the force application point
• The diameter of the wire
• The strength of the magnetic field

When is the torque on a current-carrying loop at its maximum?

• When the current is maximum
• When the magnetic field is strongest
• When the lever arms are at their maximum
• When the wire temperature is highest

What happens to the torque when the lever arms are zero?

• It reaches its maximum value
• It becomes negative
• It remains constant
• It becomes zero

What is the primary purpose of electric motors?

• To generate magnetic fields
• To store electrical energy
• To convert magnetic energy to heat
• To convert electrical energy to rotational motion