All the edges of a block with parallel faces are unequal. Its longest edge is twice its shortest edge. The ratio of the maximum to minimum resistance between parallel faces is.

n equal resistors are first connected in series and then connected in parallel. What is the ratio of the maximum to the minimum resistance ?

A conductor having cubold shape has dimensions in ratio 1: 2:5, the ratio of maximum to minimum resistance across two opposite faces is

A metal block has lengths 50 cm, breadth 30cm and thickness 20cm. When current passes through it parallel to its length and parallel to its breadth, the ratio of maximum to minimum resistance of that block is

Dimensions of a block are 1 cm xx 1cm xx 100cm . If specific resistance of its material is 3 xx 10^(-7) ohm-m , then the resistance between the opposite square faces is

Twelve identical resistances arranged on all edges of a cube. The resisors are all the same. Then find the equivalent resistance between the edges A and B as shown in.

Comprehesion-I Let k be the length of any edge of a regular tetrahedron (all edges are equal in length). The angle between a line and a plane is equal to the complement of the angle between the line and the normal to the plane whereas the angle between two plane is equal to the angle between the normals. Let O be the origin and A,B and C vertices with position vectors veca,vecb and vecc respectively of the regular tetrahedron. The angle between any edge and a face not containing the edge is

Name the pairs of all possible parallel edges of the pencil box whose figure is shown in Figure.

The dimensions of a block are 1cmxx1cmxx100cm. If the specific resistance of its material is 2xx10^(-7) ohmxxmetre , then the resistance between the opposite rectangular faces is

Comprehesion-I Let k be the length of any edge of a regular tetrahedron (all edges are equal in length). The angle between a line and a plane is equal to the complement of the angle between the line and the normal to the plane whereas the angle between two plane is equal to the angle between the normals. Let O be the origin and A,B and C vertices with position vectors veca,vecb and vecc respectively of the regular tetrahedron. The angle between any two faces is

Let k be the length of any edge of a regular tetrahedron (a tetrahedron whose edges are equal in length is called a regular tetrahedron). Show that the angel between any edge and a face not containing the edge is cos^(-1)(1//sqrt(3)) .