An electric circuit contains an induelance
4 resistance Rand voltage the current
7. is giver by E=R1 + L dI find the
time
that elapses before as it reaches
80% of its maximum value &
Given L = 540 henry, R-300 & E= 440ve
Answers
Answered by
0
Answer:
1
Step-by-step explanation:
Let I be current at ant time t
EMF E=5 volts , resistance R=50 ohms and inductance L=1 henry
The basic equation of current for RL circuit is
dt
dI
+
L
R
I=
L
E
⇒
dt
dI
+50I=5
This is a linear equation and the solution of it is I=ce
−50t
+
10
1
At t=0 , I=0. So we get c=−
10
1
Therefore the equation for current will become I=−
10
1
e
−50t
+
10
1
As t tends to infinite , the value of I tends to
10
1
Therefore the correct option is C
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