1.Which plot in Q 1 correctly describes the magnitude of the current through the

Question

1.Which plot in Q 1 correctly describes the magnitude of the current through the bulb as a function of time after the switch moves from B to A (when the next person uses the bathroom)?

2.Which plot correctly describes the magnitude of the charge on the capacitor as a function of time after the switch moves from B to A?

3.Explain what happens in the circuit, and why, when the switch moves from B to A (when the next person uses the bathroom).

4.One of your housemates complains that the light turns off too quickly in the bathroom. What component(s) could you change in the circuit to increase the time that the light is on for and why would this work?

Explanation / Answer

1) B, because current decreases exponentially

2) B, because charge on capacitor decreases exponentially

3) when switch moves from B to A, the capacitor start discharging through bulb.

Initially the current is maximum. but the current decreases exponentuilly.

so, brightness of the bulb decreases as the time passes.

4) By increasig capciatnce(C) value we can increase the time.

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