In a neutral conducting hollow sphere of inner and outer radii 5 cm and 10 cm respectively, a point charge Q= 1C is placed at point A, that is 3 cm from the centre C of the hollow sphere. An external uniform electric field of magnitude 20 N/C is also applied. Net electric force on this charge is 15 N, away from the centre of the sphere as shown. Then find : (a) Force due to external electric field on the outer surface of the shell (b)Net force on shell. (c) Net force on point charge due to shell.

In a neutral conducting hollow sphere of inner and outer radii 5 cm an

1.	In a neutral conducting hollow sphere of inner and outer radii 5 cm and 10 cm respectively, a point charge Q= 1C is placed at point A, that is 3 cm from the centre C of the hollow sphere. An external uniform electric field of magnitude 20 N/C is also applied. Net electric force on this charge is 15 N, away from the centre of the sphere as shown. Then find : (a) Force due to external electric field on the outer surface of the shell (b)Net force on shell. (c) Net force on point charge due to shell.
Answer» Answer :(a) 20 N RIGHT hand SIDE (b) 35 N right hand side (C) 35 N left hand side

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