A: What is the ammeter reading I ? Express your answer in terms of E, R, and rin

Question

A: What is the ammeter reading I?

Express your answer in terms of E, R, and rint.

B: What is the voltmeter reading V?

Express your answer in terms of E, R, and rint.

Answer=??

C: What is the power PR dissipated in the resistor?

Express your answer in terms of I and V.

Answer: P=IV

D: Again, what is the power PR dissipated in the resistor?

This time, express your answer in terms of one or more of the following variables: I, rint, and R.

Answer: P=I^2(R)

E:

For the third time, what is the power PR dissipated in the resistor?

Express your answer in terms of one or more of the following variables: E, rint, and R.

Answer=??

Explanation / Answer

B)

i = E/(R + r)

iR = E - ir               eq-1

Reading of Voltmeter = Voltage across "R" = iR

V = iR

V =ER/(R + r)

E)

P = i2 R

P = (E/(R + r))2 R                  since i = E/(R + r)

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