Download Bell Work: series circuit (use your phet simulation)

Bell Work: series circuits
(use your phet simulation)
1. The ( current / voltage / resistance ) drop in
each resistor add up to the total ( current /
voltage / resistance ) supplied by the battery.
2. The ( current / voltage / resistance ) is the
same everywhere.
3. There is ( one / multiple ) paths.
4. The ( current / voltage / resistance ) of all
pieces in the circuit add up to the total
(current / voltage / resistance ).
Solving Series Circuits
Either use Ohm’s law or the series circuit rules.
Ohm’s law must be applied for the entire circuit
(total) or at one resistor.
VT  I  RT
V1  I  R1
V2  I  R2
V3  I  R3
Series circuit rules
1. Voltage adds up.
Vtotal  V1  V2  .....
2. Current is the same everywhere.
I total  I1  I 2  .....
3. Resistance adds up.
Rtotal  R1  R2  .....
Let’s Practice!
Practice #1
12 Ω
RT = ______
1A
IT = _______
1A
I1 = _______
1A
I2 = _______
V1 = ______
3V
V3 = ______
5V
Practice #2
15 Ω
RT = ______
3A
IT = _______
3A
I2 = _______
3A
I5 = _______
9V
V3 = ______
12 V
V4 = ______
Solving Parallel Circuits
Either use Ohm’s law or the parallel circuit rules.
Ohm’s law must be applied for the entire circuit
(total) or at one resistor.
V  I T RT
V  I1  R1
V  I 2  R2
V  I 3  R3
Parallel circuit rules
1. Voltage drop at each resistor is the same as what
is supplied by the charge pump.
Vtotal  V1  V2  .....
2. Current in the paths add up.
I total  I1  I 2  .....
3. Inverse of resistances add up.
1
Rtotal
1
1


 .....
R1 R2
Let’s Practice!
Practice #1
8Ω
RT = ______
2A
IT = _______
16 V
V1 = _______
16 V
V2 = _______
I1 = ______
1.6 A
I2 = ______
0.4 A
16V
10Ω
40Ω
Practice #2
4.8 Ω
RT = ______
5A
IT = _______
24 V
V2 = _______
24 V
V3 = _______
0.8 A
I3 = ______
0.6 A
I4 = ______