Current Electricity If the efficiency of a machine is to be high, what should be low? Input power kWh consumed Losses True component of power Input power kWh consumed Losses True component of power ANSWER DOWNLOAD EXAMIANS APP
Current Electricity Ohm's law is not applicable to Small resistors Semi-conductors Dc circuits High currents Small resistors Semi-conductors Dc circuits High currents ANSWER DOWNLOAD EXAMIANS APP
Current Electricity A copper wire is stretched so that its length is increased by 0.1 % . The change in its resistance is 0.2% 0.4% 0.3% None of the listed here 0.2% 0.4% 0.3% None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Current Electricity Which of the following statement is true both for a series and a parallel D.C. circuit? Voltages are additive Power are additive Elements have individual currents Currents are additive Voltages are additive Power are additive Elements have individual currents Currents are additive ANSWER DOWNLOAD EXAMIANS APP
Current Electricity An electrical lamp coonsumes 100 W of power. If the supply voltage is 220 V the energy consumed in 30 minutes is 5 kWh 0.005 kWh 0.05 kWh 5 kWh 5 kWh 0.005 kWh 0.05 kWh 5 kWh ANSWER DOWNLOAD EXAMIANS APP
Current Electricity A rheostat differs from potentiometer in the respect that it Has lower wattage rating Has large number of turns Has higher wattage rating Offers large number of tapping Has lower wattage rating Has large number of turns Has higher wattage rating Offers large number of tapping ANSWER DOWNLOAD EXAMIANS APP
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