Part B What is the current in the circuit in (Figure 2) ? Suppose that E2 = 9.0

Question

Part B

What is the current in the circuit in (Figure 2) ? Suppose that E2 = 9.0 V and E3 = 14.0 V .

Express your answer with the appropriate units. Enter positive value if the current is clockwise and negative value if the current is counterclockwise.

Part C

What is the current in the circuit in (Figure 3) ? Suppose that E4 = 4.0 V and E5 = 9.0 V .

Express your answer with the appropriate units. Enter positive value if the current is clockwise and negative value if the current is counterclockwise

Explanation / Answer

Part A

effective emf in the circuit

E = E2 -E1

E = 9 - 14 = -5V

effective resistance of the circuit

R = 180+150 = 330 ohms

current

I =E/R = -5/330 = 0.0151 A

I = -15.1 mA

Part B

effective emf

E = E4-E5

E = 4-9 =-5 V

effective resistance

R = 5+10+10+15+5 = 45 ohms

current I =E/R

I = -5/ 45 = - 0.11 A

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