In the figure, suppose that epsilon = 60V, R = 240 Ohm and L = 0.160H. Initially

Question

In the figure, suppose that epsilon = 60V, R = 240 Ohm and L = 0.160H. Initially there is no current in the circuit. Switch S_2 is left open and switch S_1 is closed. Just after S_1 is closed, What is the potential difference V_ab? Just after S_1 is closed, What is the potential difference V_bc? A very long time after S_1 is closed, What is the potential difference V_ab? A very long time after S_1 is closed, What is the potential difference V_bc? What is V_ab at an intermediate time when i = 0.150A? What is V_bc at an intermediate time when i = 0.150A?

Explanation / Answer

a) Voltage Vab = 0 as cuurent cant change suddenly in the circuit from zero because there is inductor

b) Vbc = E-Vab = 60 V

c) Vab = 60 V, as current has reached ti equilibrium.

d) Vbc = E-Vab = 60-60 = 0 V

e) Vab = iR = 0.150*240 = 36 V

f) Vbc = E-Vab = 60-36 = 24 V

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