Questions
A parallel plate capacitor is made of two circular plates separated by a distance of 5 mm and with a dielectric of dielectric constant 2.2 between them. When the electric field in the dielectric is 3 x 104 V/m, the charge density of the positive plate will be close to:
detailed solution
Correct option is B
E=σε=σKε0=3×104V/m ∴σ=Kε0×3×104 =2.2×8.854×10−12×3×104=6×10−1Cm−2Talk to our academic expert!
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Two identical metal plates are given positive charges Q1 and Q2 (<Q1) respectively. If they are now brought close together to form a parallel plate capacitor with capacitance C, the potential difference between them is
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