Current Electricity If the efficiency of a machine is to be high, what should be low? True component of power Losses Input power kWh consumed True component of power Losses Input power kWh consumed ANSWER DOWNLOAD EXAMIANS APP
Current Electricity All good conductors have high Reluctance Thermal conductivity Resistance Conductance Reluctance Thermal conductivity Resistance Conductance ANSWER DOWNLOAD EXAMIANS APP
Current Electricity A rheostat differs from potentiometer in the respect that it Has higher wattage rating Has lower wattage rating Has large number of turns Offers large number of tapping Has higher wattage rating Has lower wattage rating Has large number of turns Offers large number of tapping ANSWER DOWNLOAD EXAMIANS APP
Current Electricity A light bulb draws 300 mA when the voltage across it is 240 V. The resistance of the light bulb is 800 Ω 1000 Ω 400 Ω 600 Ω 800 Ω 1000 Ω 400 Ω 600 Ω ANSWER DOWNLOAD EXAMIANS APP
Current Electricity Which of the following materials has the least resistivity ? Zinc Copper Lead Mercury Zinc Copper Lead Mercury ANSWER DOWNLOAD EXAMIANS APP
Current Electricity Nichrome wire is an alloy of Nickel and chromium Chromium and vanadium Copper and silver Lead and zinc Nickel and chromium Chromium and vanadium Copper and silver Lead and zinc ANSWER DOWNLOAD EXAMIANS APP
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