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Act.02.16

# Act.02.16 - (c What happens to the charge on the capacitor...

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In class activity, February 16, 2011 The figure shows plots of charge versus potential difference for three parallel-plat capacitors, which have the plate areas and separations given in the table. Which of the plots goes with which of the capacitors? (i) Capacitor 1 goes with Curve (a) Curve (b) Curve (c) (ii) Capacitor 2 goes with Curve (a) Curve (b) Curve (c) (iii) Capacitor 3 goes with Curve (a) Curve (b) Curve (c)

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Physics 2102, February 16, 2011. Activity 1: The figure shows a parallel plate capacitor, connected to a battery that maintains a potential difference V between the two plates of the capacitor. Each plate is circular, with a radius R . The distance between the plates is d . (a) What is the capacitance C of this capacitor? Express your answer in terms of ε 0 , R and d . (b) The plates are now pulled apart so that the distance between them is 2d . What is the new capacitance?
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Unformatted text preview: (c) What happens to the charge on the capacitor? Is the charge on the capacitor bigger or smaller on the capacitor in (b), compared to the one in (a)? (Remember, the battery is connected all the time, and maintains a potential difference of V ). Activity 2: Now we will consider the same capacitor, with plate separation d and circular plates with radius R. The capacitor is charged by the battery so that its potential difference is V. Then the battery is disconnected, and subsequently the two plates are pulled further apart so that the distance is 2d. (a) What happens to the charge on the capacitor? Does it increase, decrease, or stay the same? (b) What happens to the potential difference between the two plates? Does it increase, decrease, or stay the same? (c) What happens to the electric field between the two plates? Does it increase, decrease, or stay the same?...
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Act.02.16 - (c What happens to the charge on the capacitor...

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