Consider the following circuit. After leaving the switch at the position a for a

Question

Consider the following circuit. After leaving the switch at the position a for a long time, move the switch from a to b. There will be the usual LC circuit oscillations.

What is the maximum current?

Consider the following statements: A1. The current flow is counterclockwise. A2. The current is zero. A3. The current flow is clockwise. B1. The charge on the left plate of C is positive. B2. The charge on the left plate of C is zero. B3. The charge on the left plate of C is negative. Which pair of choices below best describes the situation at t = 5 8 T, where T is the period of oscillations in LC circuit? Let the time when the switch is moved from a to b be at t = 0.

1. A1 and B3

2. A2 and B3

3. A1 and B1

4. A1 and B2

5. A2 and B2

6. A3 and B1

7. A3 and B3

8. A3 and B2

9. A2 and B1

Explanation / Answer

maximum charge stored in capacitor is given as ::

Qmax = CE

angular frequency of oscillation is given as ::

w = 1/sqrt(LC)

the maximum current is given as ::

Imax = wQmax

Imax = (1/sqrt(LC)) CE

Imax = E sqrt(C/L)

so 6

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