Question

A normal polarity magnet moves toward a stationary coil at 20 cm/s, and induces a maximum current of –8 mA. Which scenarios would induce the same maximum current and the same current direction (–), if the distance between the two objects is the same? Check all that apply.

a stationary magnet and a coil rotating at 20 cm/s rather than moving
both the magnet and the coil moving toward each other at 10 cm/s each
a reversed polarity magnet moving toward a stationary coil at 10 cm/s
a normal polarity magnet stationary with a coil approaching at 15 cm/s
a reversed polarity magnet moving away from the coil at 20 cm/s

Answer 1

If the distance between the two objects is the same, then;

Both the magnet and the coil moving toward each other at 10 cm/s each

A reversed polarity magnet moving away from the coil at 20 cm/s

Calculate current that produces a magnetic field, and use the right hand rule 2, to determine the direction of current or the direction of magnetic field loops.