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voltage,

Find:

a) The first order differential equation for current (1)

b) The current at t = 0.5s

c) The expression for voltage across the resistor (VR )and voltage across the inductor (VL)

d) Time at which VR = VL

e) Using Laplace transforms find the expression for the current (i) flowing through the

circuit/nActivity 3

A series RL circuit in a power amplifier with resistance R = 500 and inductance L = 10H has a

constant voltage V = 100V applied at t = 0 by closing a switch.

Given:

E

R

switch

ww

L

Voltage Drop across Resistor (VR) is IR,

Voltage drop across the Inductor (VL) is directly proportional to the rate of change of

current passing through the inductor,

Fig: 1

Fig: 2