***Help with all or only a few is much appreciated*** The points b and c on the
ID: 1669768 • Letter: #
Question
***Help with all or only a few is much appreciated***
The points b and c on the diagram are theterminals of a battery with EMF E and internal resistance r. The circuitresistors have the following values:
R1 = 37 W,R2 = 41 W,R3 = 51 W,R4 = 56 W
(a) An ideal voltmeter is connected between b and c; it readsVc - Vb = 12 V. What is theEMF of the battery?
E = V
(b) What resistance would an ohmmeter connected across pointsa and c read?
R = W
(c) An ideal ammeter is inserted between points a andb it reads 0.18 A. Determine the internal resistance ofthe battery?
r = W
(d) What does the voltmeter connected across b andc read now?
Vc - Vb = V
(e) Calculate the magnitude of the current throughR2.
I2 = A
(f) At what rate is thermal energy (heat) being producedinside the battery?
Pint = W
(g) What is the power being provided by the battery to theexternal circuit (outside the battery)?
Pload = W
***Help with all or only a few is much appreciated***
The points b and c on the diagram are theterminals of a battery with EMF E and internal resistance r. The circuitresistors have the following values:
R1 = 37 W,R2 = 41 W,R3 = 51 W,R4 = 56 W
Explanation / Answer
b,R=(R1+R2+R3)*R4/(R1+R2+R3+R4)=39.05 (Ohm) c,r=E/I-R=27.62 (Ohm) d,U=E-I*r=7.02 V e,IR2=I*R4/(R1+R2+R3+R4)=0.05 A f,Pin=I^2*r=0.89 W g,Pload=I^2*R=1.265WRelated Questions
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