Two concentric spherical shells have masses `m_(1)`, `m_(2)` and radit `R_(1)`,`R_(2) (R_(1) lt R_(2))`. Calculate the force by this system on a particle of mass `m`, if it is placed at a distance `((R_(1) + R_(2)))/(2)` from the centre.

Two concentric spherical shells have masses m_(1) and m_(2) and radii r_(1) and r_(2) (r_(2) gt r_(1)) . What is the force exerted by this system on a particle of mass m_(3) . If it is placed at a distance r(r_(1) lt r lt r_(2)) from the centre ?

Two concentric spherical shells have masses m_(1) and m_(2) and radii r_(1) and r_(2) (r_(2) gt r_(1)) . What is the force exerted by this system on a particle of mass m_(3) . If it is placed at a distance r(r_(1) lt r lt r_(2)) from the centre ?

Two concentric spherical shells have masses M_1,M_2 and radii R_1,R_2(R_1ltR_2) . What is the force exerted by this system on a particle of mass m if it is placed at a distance (R_1+R_2)/2 from the center?

Two concentric spherical shells have masses M_1,M_2 and radii R_1,R_2(R_1ltR_2) . What is the force exerted by this system on a particle of mass m if it is placed at a distance (R_1+R_2)/2 from the center?

Two concentric sphereical shels have masses M_1,M_2 and radii R_1,R_2(R_1+R_2) . What is the force exerted by this system on a particle of mass m_1 if it is placed t a distance (R_1+R_2)/2 from the centre?

The capacitance of two concentric spherical shells of radii R_(1) and R_(2) (R_(2) gt R_(1)) is