Part A Figure 30.2c (Figure 1) An R-L circuit is shown, with a 10- resistor and
ID: 1450368 • Letter: P
Question
Part A
Figure 30.2c
(Figure 1)
An R-L circuit is shown, with a 10- resistor and an ideal 32-H inductor, that has zero resistance. At time t = 0 s, there is a 12-A current in the circuit. In Fig. 30.2c, when the current is decreasing at the rate of 2.0 A/s, the time t is closest to:
Figure 30.2c
An R-L circuit is shown, with a 10- resistor and an ideal 32-H inductor, that has zero resistance. At time t = 0 s, there is a 12-A current in the circuit. In Fig. 30.2c, when the current is decreasing at the rate of 2.0 A/s, the time t is closest to:
Explanation / Answer
Here, I = Io * e(-tR/L)
=> dI/dt = Io * (-R/L) * e(-tR/L)
=> 2 = 12 * (10/32) * e(-t10/32)
=> 0.533 = e(-t10/32)
=> t = 2.0 sec ------------------> the time t is closest