(13%) Problem 1 : Two batteries with emf E-3 V and internal resistance r-8 ? and
ID: 2037495 • Letter: #
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(13%) Problem 1 : Two batteries with emf E-3 V and internal resistance r-8 ? and a resistor with Ro-45 ? are connected in series as shown in the figure. Ro Ctheexpertta.c a25% Part (a) Express the total resistance, R, in terms ofr and Ro- Grade Summary Deductions Potential10 Submissioms Attempts remaining per attempt 4 5 6 detailed view Ro Hint l give up! Hints: deduction per hins.Hi remaining Feedback dedactice per feedlback 25% Part (b) Express the current, I, in terms of the emf, E, and the total resistance, R 25% Part (c) Express the voltage, ? V, across the resister in terms of land R0. 25% Part (d) Calculate the value of ?? in volts. Ail content © 2018Expert TA. LLCExplanation / Answer
a) total resistance R = 2 r + R0
b) current I = 2 E / R
c) delta V = I R0
d) delta V = I R0 = (2 E / R) * (R0) = (2 E R0) / (2 r + R0)
= (2 * 3 * 45) / ((2 * 8) + 45)
= 4.43 volts
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