1.) Using this image of a DC current, answer the following questions. A.) Which

Question

1.) Using this image of a DC current, answer the following questions.

A.) Which resisters would you consider to be parallel and which would you consider to be in series?

B.) Find the equivilent resistance betweeen the two points A and B

C.) Find the equivilent resistance between the points C and D.

D.) Find the equivilent distance between point A and point D.

2.) What is the internal resistance of the battery, when after turning it on the potential meter shows 8V, and the current meter shows 2.5 Amps?

Explanation / Answer

a)

R1 and R2 are in parallel

R4 and R5 are in parallel

b)

1/RAB =1/RA+1/RB =1/10 +1/4

RAB=2.857 ohms

c)

1/RCD =1/RC+1/RD=1/8 +1/1

RCD=0.889 ohms

d)

equivalent resistance

RAD=RAB+RC+RAD=2.857+3+0.889

RAD=6.75 ohms

2.

Internal resistance

r=V/I =8/2.5 =3,2 ohms

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