Current Electricity In which of the following substances the resistance decreases with increase in temperature? Silver Copper Constantan Carbon Silver Copper Constantan Carbon ANSWER DOWNLOAD EXAMIANS APP
Current Electricity Resistance of a material always decreases if Temperature of material is decreased Temperature of material is increased None of these Number of free electrons available becomes more Temperature of material is decreased Temperature of material is increased None of these Number of free electrons available becomes more ANSWER DOWNLOAD EXAMIANS APP
Current Electricity Sparking occurs when a load is switched off because the circuit has high Inductance Resistance Capacitance Impedance Inductance Resistance Capacitance Impedance ANSWER DOWNLOAD EXAMIANS APP
Current Electricity One commercial unit of energy equals Ten kilowatt-hour One watt-hour One kilowatt-hour One watt-hour Ten kilowatt-hour One watt-hour One kilowatt-hour One watt-hour ANSWER DOWNLOAD EXAMIANS APP
Current Electricity Are the materials having electrical conductivity much less than most of the metals but much greater than that of typical insulators. Variable resistors Thermistor Varistors Semiconductors Variable resistors Thermistor Varistors Semiconductors ANSWER DOWNLOAD EXAMIANS APP
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
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