Solution to Frame 68
FRAME 69
Rt =
1
a. In the parallel circuit below, Rt equals _______________.
1+1+1
b. Rt (is/is not) less than the smallest resistor.
2 4 8
1
= 1 = 8
4 +2+1
7
7
8
8 8
8
= 1.14Ω
Solution to Frame 69
FRAME 70
a. Rt =
1
So far you have learned that:
1 +1+1
R1 R2 R3
a. A parallel circuit has (only one/more than one) path for
current to flow.
Rt =
1
1 + 1+ 1
10 20 40
b. To find Rt, you use the formula _________________.
1
= 1 = 40
c. You can check on any Rt you compute because the Rt in
4 +2+1
7
7
a parallel circuit must be (more/less) than the
40 40 40 40
Rt = 5.71Ω
b. is
Solution to Frame 70
FRAME 71
a. more than one
To help prevent confusion between finding Rt in series
circuits and finding Rt in parallel circuits, answer the
b. Rt =
1
questions below:
1 +1+1
R1 R2 R3
c. less, smallest
a. To find Rt in the SERIES
b. To find Rt in the
CIRCUIT above, use this
PARALLEL CIRCUIT
formula:
above, use this formula:
MD0903
1-24