The formula for total voltage in a parallel circuit is ____.
A. ET = ER1 = ER2 = ER3 ... = ERn
B. ET = ER1 + ER2 + ER3 ... + ERn
C. 1/ET = 1/ER1 + 1/ER2 + 1/ER3 ... + 1/ERn
D. ET = ER1 - ER2 - ER3 ... - ERn
Answer: A
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