Recitation Worksheet U Solutions

# Recitation Worksheet U Solutions - Worksheet U Capacitance...

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Worksheet U: Capacitance. - 1 - + Q Q d × A × B × C Two thin plates of area A with charges + Q and Q are kept fixed at distance d from each other. The distance between the plates is much smaller than the sides of the plates. a. Write expressions for: The surface charge density on the plates. Q A σ The electric field magnitude at points A, B and C. 00 0 ; AC B Q EE E A ε == The potential difference between the plates. 0 Q Vd A ∆= The ratio Q V . 0 QA = b. The charge on each plate is doubled. How does this affect the surface charge density on the plates? It doubles. the electric field inside and outside the plates? It doubles. the potential difference between the plates? It doubles. The ratio Q V ? Compare your answer to your result in part a. It is the same as in part a. This quantity is called capacitance Q C V = . Does it depend on the charge of the plates? No.

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(Worksheet U) - 2 - + Q Q D d V 0 d c. For the following questions, refer to the original situation, with charges, + Q
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Recitation Worksheet U Solutions - Worksheet U Capacitance...

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