MYP Physics Topic 3.7 Electromagnetic Forces and…

True or False: In electromagnetic induction, the direction of the induced current changes instantly if the direction of motion of the magnet relative to the coil is reversed.

True or False: In a simple DC motor, reversing the direction of the magnetic field while keeping the current direction the same will cause the coil to rotate in the opposite direction.

When modeling induction as 'cutting through magnetic field lines,' which of the following would NOT increase the number of lines cut per second?

For an ideal gas-law style calculation in induction, we model 'stronger' magnetic fields by representing the field lines as:

If the current flowing through a wire in a fixed magnetic field is tripled, how does the force on the wire change?

Moving the wire faster through the field

Moving the wire parallel to the magnetic field lines

Using a coil with more turns of wire

Using a stronger magnet with closer field lines

Dashed instead of solid

The force triples in magnitude but its direction remains the same

The force triples in magnitude and its direction reverses

The force remains the same because the magnetic field is constant

The force increases by a factor of nine

MYP Physics 3.7 Electromagnetic Forces and Induction Questionbank

MYP Physics 3.7 Electromagnetic Forces and Induction Questionbank

MYP Physics 3.7 Electromagnetic Forces and Induction Questionbank

MYP Physics 3.7 Electromagnetic Forces and Induction Questionbank

MYP MYP Physics Topic 3.7 Electromagnetic Forces and Induction Questionbank