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A parallel plate capacitor with air as dielectric between the plates has a separation of 5mm and plate area 50 cm^(2) is connected to a 200V source. Calculate a. the charge on the plates. (b) the charge on the plates if the space between the plates is filled with a dielectric K=5 |
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Answer» SOLUTION :DATA supplied, `C=(epsi_(0) KA)/(d) and q=CV ""epsi_(0)=8.854 xx 10^(-2) C^(2)//Nm^(2)` K=1 for air `A=50 cm^(2)=50 xx 10^(-1) m^(2)""d=5mm=5 xx 10^(-3)m` V=200V `a, therefore q=(epsi_(0)KV)/(d)=(8.854 xx 10^(-12) xx 1 xx 50 xx 10^(-4) xx 200)/(5 xx 10^(-3))=1.77 xx 10^(-9)C=1.77nC` (b), `q=(epsi_(0) K.A.V)/(d)=(8.854 xx 10^(-12) xx 5 xx 50 xx 10^(-4) xx 200)/(5 xx 10^(-3))""q=8.85nC` |
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