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Question: a) What is the potential difference Vad in thecircuit?
b) What is the terminal voltage of the 4V battery?
c) A battery with emf 10.3V and internal resistance .5ohm isinserted in the circuit d with its negative terminal connected tothe negative terminal of the 8V battery. WHat is the difference ofpotential Vbc between the terminals of the 4V batterynow?
For part: a) How do you know to subtract 8V-4V when determining the current?Also, why did you choose to determine Vadusing thevalues from the bottom of the circuit? In other words, could youdetermine Vad using the 6Ω resistor, 4V batterywith .5Ω internal resistance, and 9Ω resistor?b) Why do you use ε+Ir and not ε-Ir? (How do you knowwhen to add them or to subtact them for future problems?)c) Similar to part a - how do you know which voltages are positivevalues and which are negative when determining Î"V?
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