What is the coil current 2ms after being connected to the supply if a coil of inductance 0.5H and resistance 500Omega is connected across a 250V DC supply? (The time constant T of the circuit is 1ms).
1 Answer
May 28, 2018
spanishplus.tripod.com/maths/CircuitExample1
For an LR Series circuit as shown in the figure above, the expression for the current
I(t)=E/R(1-e^(-t/tau))
where time constanttau= L/R andE/R represents the final steady state current in the circuit.
Inserting given values we get
I_"(2 ms)"=250/500(1-e^(-2/1))
=>I_"(2 ms)"=0.43\ A
.-.-.-.-.-.-
We can verify that