In the figure V = 20.0V, R1 10.00, R2 = 10.00, R3 = 30.00, R4 = 15.00. 

Determine the electric potential across R when the switch S is open. n: 20 = 20 V 

Determine the electric potential across R when the switch S is closed. R w S R t) How would the electric potential across R change (switch closed) if another resistor battery between R and the "negative" terminal? (Draw the circuit and explain.)

 

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circuit C2 3.00 micro F R2 b a S R1 m C1 6.00 micro F circuit C2 3.00 micro F R2 b a S R1 m C1 6.00 micro F