Q5: i)Which of the following is not a component of sodium vapour lamp accessories?       Ballast       Capacitor     Ignitor       Goggles   ii)Which of the following is not a discharge lamp?       Fluorescent tube       Mercury vapour lamp     Sodium Vapour Lamp       Incandescent lamp     iii)While measuring efficacy of  a mercury  vapour lamp, the luminous flux density is measured using ___       Voltmeter       Power meter     Thermometer       LUX meter

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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.