#### asp1987

##### New Member

Hi,

Today I wrote a placement test for ANALOG DEVICES. Did not qualify though. Here are some of the questions they asked.

1) Find the resistance of the frustum of a cone( its hollow) made with a material of uniform thickness and resistivity 'rho' or lets say 'Z'. The radii of the smaller and larger flat bases are 'L' and '2L' respectively. Height = 'L'. The two flat bases are covered with a zero resistance material. The resistance is measured between two terminals, one lead at the centre of the smaller flat base and the other lead at the centre of the larger flat base.

Also this frustum, a capacitor and a dc voltage source are connected in series. Find an expression for capacitor voltage.

Please help me solve these.

Is this the right forum?

Today I wrote a placement test for ANALOG DEVICES. Did not qualify though. Here are some of the questions they asked.

1) Find the resistance of the frustum of a cone( its hollow) made with a material of uniform thickness and resistivity 'rho' or lets say 'Z'. The radii of the smaller and larger flat bases are 'L' and '2L' respectively. Height = 'L'. The two flat bases are covered with a zero resistance material. The resistance is measured between two terminals, one lead at the centre of the smaller flat base and the other lead at the centre of the larger flat base.

Also this frustum, a capacitor and a dc voltage source are connected in series. Find an expression for capacitor voltage.

Please help me solve these.

Is this the right forum?

Last edited: