5. DC
• Direct Current
• Charges flow in
1 direction
• Used by
Thomas Edison
• Type of current
found in battery
6. AC
• Alternating Current
• Charges move back &
forth in circuit
• Used by Nikola Tesla
• Advantage over DC-
voltage can be easily
raised or lowered
• Type of current found in
homes
7. Bill Nye The Science Guy-
AC/DC Charge
• Well, everybody knows
That when electrons flow
That flow is known as electricity
And although you might say "So?", without it don't you know
You'd be unplugged but not on MTV
Now in a battery, current's called DC
It flows straight from the minus to the plus
But the current in your wall is known as AC, y'all
And it cycles back and forth without a fuss.
So don't lose that charge, that AC/DC charge
Your current alternating or direct
'Cause if you lose that charge, that AC/DC charge
There's no reason for a circuit to connect
Oooooooh
YouTube video-Bill Nye AC DC song
14. TRANSFORMER
• device that increases
or decreases voltage
• consists of 2
separate coils of wire
wrapped around an
iron core
1. primary coil
2. secondary coil
