D

A magnet passing through a coil of wire does not produce enough electric current to light the bulb. what are two ways to increase the amount of current?

6 Answers
A magnet passing through a coil of wire does not produce enough electric current to light the bulb. what are two ways to increase the amount of current?
I

This is Isisla29 again.
What most of the previous answers have ignored is the one principle in induction stating that the magnetic field produced in a coil is to move the magnet FAST!

It is the RATE OF CHANGE OF MAGNETIC FLUX that matters most when other things are constant.

If you increase the speed with which the magnet turns in the coil (prsume you have a multipole coil and a rotating multipole magnet).

It is an observed fact that motor back emf in dc motors is also in proportion to its speed!
Likewsise generators increase their terminal voltage with speed (and excitation of course, but here you already have a magnet).

hope that suffices.

...
A

Since the magnet must pass through the core of the coil to produce an EM event, and in generators the magnet passes by the coil, then it must have an iron core to accept and develop the passing magnets flux, and a complimentary field will be created, made strong by the iron core, and when it collapses, this new temporary "magnet" is already inside the coil. The magnet must pass pole face to pole face with the iron core. With lots of turns it will generate a high AC voltage if the magnets alternate in polarity on the rotor - i.e. NSNSNSNS

...
H

Yes to all of the above and don't dismiss the quality of the magnet (rare earth).

...
R

Increase the amount of coiled wire and/or increase the strength of the magnet

...
A

Or the number of turns in the coil.

...
A

Or the number of turns in the coil.

...