question_answer 32)

A cylindrical capacitor has two co-axial cylinders of length 15 cm and radii 1.5 cm and 1.4 cm. The outer cylinder is earthed and the inner cylinder is given a charge of 3.5 C. Determine the capacitance of the system and the potential of the inner cylinder. Neglect end effects. (i.e., bending of field lines at the ends.)  

Answer:

Capacitance of a cylindrical capacitor is given by                                                 =1.21 × 10?10F.