6.15 Understand that a voltage is induced in a conductor or a coil when it moves through a magnetic field or when a magnetic field changes through it and describe the factors which affect the size of the induced voltage

Voltage is induced in a conductor (typically a wire) or coil when it moves through a magnetic field (i.e when a wire is moved back and forth in a magnetic field) or when a magnet is moved continuously in and out of a coil of wire. 

GOLDEN RULE:
Field + Motion = Current induced

If you:

• increase magnetic field strength
• increase speed of magnet going in/out of coil of wire
• increase number of coils of wire

then more current will be induced :)

Let's talk about the magnet and the coil for a second. How does it work? 

• Magnet moves into the coil (let's say S side first)
• Electrons don't like change, so they form a S pole to repel the south pole
• Magnet moves out
• But then the electrons miss the south and they want it back (they don't like change) so they create a N pole to attract the south pole back again
• Magnet moves in
• This is repeated, inducing an alternating current (AC)
• (this is the basic idea for a generator)

WARNING: DO NOT USE THE WORD "CREATE" WHEN REFERRING TO CURRENT OR VOLTAGE. YOU WILL GET MARKED DOWN / MARK WILL NOT BE GIVEN.