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Electric circuits miscellaneous

  1. In the network shown in the given figure, if the voltage V at the time considered is 20 V, then
    dV
    at that time will be
    dt


    1. 1 V/s
    2. 2 V/s
    3. – 2 V/s
    4. zero
Correct Option: B

Given: V = 20 V

∴ Current through 20 ohm resistance =
20
= 1 A
20

Voltage across 10 ohm resistor = 40 – 20 = 20 V
Then current through the capacitor = 2 – 1 = 1 A.
∴ C
dV
=
1
dV
A
dt2dt

dV
= 2 V / s.
dt



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