Current-Carrying Wires in Magnetic Fields (HSC SSCE Physics): Quizzes

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Current-Carrying Wires in Magnetic Fields
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What is the motor effect?

Force on current-carrying wire in field

What is the equation for force on a current-carrying wire in a magnetic field?

F=ℓIBsin⁡θF = \ell IB\sin\theta

When is the force on a current-carrying wire maximum?

When current and field are perpendicular

What is the force when current and magnetic field are parallel?

Zero

What does the right-hand rule determine for a current-carrying wire?

Direction of the force

What type of energy conversion occurs in the motor effect?

Electrical potential to kinetic energy

How is magnetic field strength defined?

Force per unit current per unit length

How does a loudspeaker use the motor effect?

Oscillating current moves coil and cone

A 55 A current flows through 0.20.2 m of wire perpendicular to a 0.40.4 T field. What is the force?

0.40.4 N

What is the direction of the force on a current-carrying wire?

Perpendicular to both current and field

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