Comment PSS 21.2: A Circuit with an Inductor Learning Goal: To apply Problem-Sol
ID: 1264533 • Letter: C
Question
Comment
PSS 21.2: A Circuit with an Inductor Learning Goal: To apply Problem-Solving Strategy 21.2 Inductors in circuits. Consider the circuit in the diagram, containing two identical resistors, RA and RB, of resistance R = 210 ohm , an inductor of inductance L = 360mH , and a voltage source with potential difference V = 8.00V. (Figure 1) At some time t after the switch is closed, the current through point B is IB = 10.0mA . At this time, what is the rate of change delta IB/delta t of the current through point Find the value of delta IB /delta t at time t Express your answer in amperes per second to three significant figures. an M In the circuit shown in the figure (Figure 1) , S1 has been closed for a long enough time so that the current reads a steady 3.60A. Suddenly, S2 is closed and S1 is opened at the same instant. Assume that L = 1.9mB and C = 4.2muF. What is the maximum charge that the capacitor will receive? Express your answer using two significant figures. Part B What is the current in the inductor at this time?Explanation / Answer
21.1 Part B
Let the area vector point along the z-axis:
Flux = B.A = B*cos(52.9)*pi*r^2
= 0.243*0.603*3.14*(7.5x 10-2)2
= 2.588 x 10-3 Wb Ans.
Part C
Let the area vector point along the Y-axis:
Flux = B.A = B*cos(90)*pi*r^2
= 0 Wb Ans.