In the circuit of Figure 1143 there is initially no current

In the circuit of Figure 11-43, there is initially no current. Determine the inductor voltage at the following times after the switch is closed: (a) 10 mu s (b) 20 mu s (c) 30 mu s (d) 40 mu s (e) 50 mu s

Solution

time constant T = L/R

Here L= 10mH and R = 1 K ohm

so T= 10mH/1 K

= 10 micro second

Therefore T= 10microseconds