1. A rectangular carbon block has dimensions 1.0 cm × 1.0 cm x 50 cm. (a) What is the resistance measured between the two square ends? Resistivity of carbon at 20°C is 3.5 x 10-5 N-m. (b) A current of 5 A exists in a 10 Q resistance for 4 minutes, (c) how many Coulombs?

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Electrical Heating Unit

The conversion of electrical energy to heat energy is known as electric heating. The heating system that converts the electrical energy to heat energy for various application is called electrical heating unit. Electricity is employed as the firing mechanism in electric heating systems, which transforms electric current to heat. Electric heaters have heating elements in the form of electric resistors.