Current Electricity A copper wire has a resistance of 10 Ω. It is stretched by one-tenth of its original length. Then its resistance will be 9 Ω 12.1 Ω 10 Ω 11 Ω 9 Ω 12.1 Ω 10 Ω 11 Ω ANSWER DOWNLOAD EXAMIANS APP
Current Electricity If the efficiency of a machine is to be high, what should be low? True component of power Input power kWh consumed Losses True component of power Input power kWh consumed Losses ANSWER DOWNLOAD EXAMIANS APP
Current Electricity The hot resistance of the bulb's filament is higher than its cold resistance because the temperature coefficient of the filament is Positive Zero Negative About 2 ohms per degree Positive Zero Negative About 2 ohms per degree ANSWER DOWNLOAD EXAMIANS APP
Current Electricity The thickness of insulation provided on the conductor depends on The magnitude of current flowing through it None of the listed here The magnitude of voltage on the conductor Both magnitude of voltage and current The magnitude of current flowing through it None of the listed here The magnitude of voltage on the conductor Both magnitude of voltage and current ANSWER DOWNLOAD EXAMIANS APP
Current Electricity The SI unit of power is Watt-hour Henry Watt Coulomb Watt-hour Henry Watt Coulomb ANSWER DOWNLOAD EXAMIANS APP
Current Electricity If the number of valence electrons of an atoms is less than 4,the substance is usually An insulator None of the listed here A semiconductor A conductor An insulator None of the listed here A semiconductor A conductor ANSWER DOWNLOAD EXAMIANS APP