The figure shows a circuit cantaining three switches, labeled S1, S2, and S3. Find the current...
The figure shows a circuit cantaining three switches, labeled S1, S2, and S3. Find the current at "a" for all possible combinations of switch settings. Put ? = 70 V, R1 = 25 ?, and R2 = 9 ?. Assume that the battery has no resistance.
Current at "a" for S2 and S3 closed and S1
open?
Current at "a" for S2 closed and S1 and S3 open?
Homework Answers
a)
when s2 AND S3 ARE CLOSED,
Requivalent=R1+R2+R1(R1+R2)/(R1+R1+R2)
=25+9+25*34/59
= 48.41 ohm
Current=v/R=70/48.41=1.446A
B)
when s2 IS CLOSED,
Requivalent=R1+(R1+R2)
=25+(25+9)
=59ohm
Current=v/R=70/59=1.19 A
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