Question

Part A Constants Just after the switch is closed, what is the magnitude of the potential difference vab across the resistor R1? In the circuit shown in the figure (Figure 1), ε-61.0 V, R,-40.0 Ω R2 21.0 , and L 0.306 H. Switch S is closed att0 Submit Request Answer Figure 1 of 1 Part B Which point, a or b, is at a higher potential? point a point b Submit Request Answer Part C

Answer 1

A)

E = Vab = 61 V

B)

A is at higher potential because there is no voltage drop of I1R1, I1 is current through R1

C)

E = Vcd = 61 V

D)

Voltage increases from b to a, so it must drop through inductor from C to d. So c is at the higher potential.

E)

I2 = 61/21 = 2.9 A

I1 = - 2.9 A

Vab = I1R1 = - 2.9 x 40 = - 116.19 V

F)

B is at higher potential

G)

Vcd = - 116.19 - 61 = - 177.19 V

D is at higher potential

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