Electromagnetic induction Flashcards
1
Q
electromagnetic induction
A
creation of potential difference across a conductor which is experiencing a change in magnetic field
2
Q
how to induce a voltage?
A
move a magnet in a coil of wire
3
Q
2 ways to reverse current/potential difference
A
move magnet in opposite direction
reverse polarity
4
Q
how to create an alternating current
A
move magnet or coil back and forth
5
Q
how do generators work.. 4 stages
A
turn magnet,
magnetic field through coil changes inducing a potential difference so current flows in wire
turn magnet half turn, direction of magnetic field reverses
potential difference reverses, current flows in other direction
6
Q
if you keep turning the magnet in the same direction
A
potential difference keeps reversing every half turn .. creating an alternating current
