In: Physics
A parallel-plate capacitor has an area of 5.00 cm2, and the plates are separated by 2.00 mm with air between them. The capacitor stores a charge of 500 pC.
(a) What is the potential difference across the plates of the capacitor?
1 V
(b) What is the magnitude of the uniform electric field in the region between the plates?
Area of capacitorA = 5 cm2 = 5*10-4m2distance d= 2 mm = 2*10-3 mpermitivity of the free space ε0 = 8.85*10-12 C2/N.m2charge Q = 500*10-12 CCapacitance of a Capacitor isC = ε0A / d=8.85*10-12*5*10-4m2 / 2*10-3 m=2.21*10-12 Fpotential difference isV= Q/C= 500 *10-12 C/ 2.21*10-12 F = 225.98Vb ) Electric field isE = V / d= 225.98/2*10-3 m=112.99*103 N /C