Question

a-What is the Role of Capacitor in AC and DC Circuit?

b-How does the charge vary with the voltage?

c-If we double voltage, how does the magnitude of charge on each plates vary? Explain.

d-What is the energy stored in the capacitor, U = 1/2CV2, in its initial configuration and how does that change as a function of separation?

Answer 1

1. Capacitor stores charges

2.As i told Capacitor stores charges with the formula Q=CV where C is capacitance and V is voltage

so Q varies directly with Voltage

3. If we double voltage, magnitude of charge on each plates will also double

Because Q=CV

C is constant thus doubling the voltage will double the charge

4. Energy stored in a Capacitor is U=1/2CV2

C will decrease if we increase the seperation

So U is inversely proportional to seperation between them

Hope you understand

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