Problem: 1) A capacitor consists of two 6.0-cm-diameter circular plates separated by 1.0 mm. The plates are charged to 170V , then the battery is removed.A) How much energy is stored in the capacitor?B) How much work must be done to pull the plates apart to where the distance between them is 2.0 mm?

Energy stored in the ca[acitor:

$U = \frac{1}{2} C V^{2}$

Capacitance, C:

$C = \frac{ε_{0} A}{d}$

A = πr², where r = D/2 = 6.0/2 = 3.0 cm

A = π(3.0 × 10^-2)² = 2.83 × 10^-3 m²

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1) A capacitor consists of two 6.0-cm-diameter circular plates separated by 1.0 mm. The plates are charged to 170V , then the battery is removed.

A) How much energy is stored in the capacitor?

B) How much work must be done to pull the plates apart to where the distance between them is 2.0 mm?

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Capacitors & Capacitance concept. You can view video lessons to learn Capacitors & Capacitance. Or if you need more Capacitors & Capacitance practice, you can also practice Capacitors & Capacitance practice problems.

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