A circuit initially consists of a parallel plate capacitor connected to the term

Question

A circuit initially consists of a parallel plate capacitor connected to the terminals of a 5.0 V battery. For each of the changes to the circuit detailed below, determine whether the energy stored by the capacitor between points D and E will increase, decrease, or remain unchanged.

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sapling learning A circuit (shown to the right) initially consists of a parallel plate capacitor connected to the terminals of a 5.0 V battery. For each of the changes to the circuit detailed below, determine whether the energy stored by the capacitor between points D and E will increase, decrease, or remain unchanged Increases Decreases Unchanged The wire from C to D is replaced by another capacitor The area of the capacitor's plates are doubled, while its plate separation is tripled Another 5.0 V battery is connected between points C and E, with the+ terminal connected to C Another capacitor is connected between points C and E he wire connecting points C and D is replaced with a 2.0 v battery, with the + terminal connected to D Yit

Explanation / Answer

1)
Unchange :- because stored energy not depend on nature of wire.

2)
Decreased

U = 1/2 CV^2 depends on C (directly proportional)

C = Eo A / d = Eo 2A / 3d = 2/3 of C

3)
decreased

because when + terminal of battery connected to C where + terminal of 1st battery is already connected it leads to net emf = 0. Because both battery are in opposite direction.

4)
decresed

if another capacitor is connected without increasing the voltage source the stored energy decreased of 1st capacitor because the same voltage is half-half distributed on both so energy of one capacitor is decreased.

5)
Increased

because the net emf or voltage becomes 7 V ( 5+2).Voltage increases energy increases.

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