Solution to Frame 68

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

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

(largest/smallest) resistance.

Rt = 5.71Ω

b. is

Solution to Frame 70

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

Integrated Publishing, Inc. |