The resistance of a semicircle shown in fig. Between its two end faces is (Given that radial thickness `=3cm`, axial thickness `=4cm`, inner radius `=6cm` and resistivity `=4xx10^(-6)Omegacm`)

What will be the resistance of a semi circle shown in fig., between its two end faces. Given that radial thickness is 3cm, axial thickness is 4 cm, inner radius is 6 cm and specific resistance is 4xx10^(-6)" ohm "-cm

When an iron wire of diameter 1 cm is copper plated uniformly. Resistance of iron reduces to 1/3 of its original value. Calculate the thickness of copper plating, Resistivities of copper and iron are 1.8 times 10^-6 Omega .cm and 1.98 times 10^-5 Omega .cm respectively.

Calculate the resistance of a hollow cylinder made of copper with inner radius 3 cm and outer radius 3.5 cm and is 12 cm long. (Speciffic resistance of copper is 1.68xx10^(-8) Omega m )

Two solid cylinders of radii 4 cm and 5 cm and lengh 6 cm and 4 cm respectively are recast into cylindrical disc of thickness 1 cm. The radius of the disc is

The size of a carbon block is 1.0xx10 cm xx50 cm . Find its resistance (i) between the opposite square faces (ii) between the opposite rectangular faces of the block. The resistivity of carbon is 3.5xx10^(-5) Omega cm .

A spherical metallic electrode has a radius 8 cm. It is concentric with a spherical metal shell of radius 10 cm. The inner space is filled with an insulator of resistivity 10^-4Omega-m . So, the resistance of the insulator is

Calculate the whole surface area of a hemisphere metal bowl of internal radius 6cm, and of thickness 2cm.

Three squares are joined together as shown in Fig. 6.14. Their sides are 4cm, 10cm and 3cm. Find the perimeter of the figure.

Two solid cylinders of radii 4 cm and 5 cm and length 6 cm and 4 cm respectively are recast into cylindrical dise of thickness 1 cm. The radius of the disc is___

A spherical ball of radius 10cm is enclosed by ice of iniform thickness in spherical shape.If ice melts at the rate of 50cm^(3)/min then the rate of decrease of thickness of ice when thickness of ice is 5cm is