(a) Just after S 1 is closed, what are the potential differences v ab and v bc ?

Question

(a) Just after S1 is closed, what are the potential differences vab and vbc?
vab = V
vbc = V

(b) A long time (many time constants) after S1 is closed, what are vab and vbc?
vab = V
vbc = V

(c) What are vab and vbc at an intermediate time when i = 0.140 A?
vab = V
vbc = V

Now looking at the following question ignoring the upper portion of the question, There is a minimum capacitance of a variable capacitor in a radio is 3.82 pF.

(a) What is the inductance of a coil connected to this capacitor if the oscillation frequency of the L-C circuit is

Explanation / Answer

1)

Vab= 0 V inductor act as an open circuit

Vbc= 62 V

inductor act as an open circuit

2)

Vab= voltage of battery=62 V Here inductor acts as simple wire.

Vbc= 0

3)

Vab=iR

=(0.14 A)(300 ohms)

=42 V

Vbc=62V -42V

=20V

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