Current Electricity If the efficiency of a machine is to be high, what should be low? True component of power Input power Losses kWh consumed True component of power Input power Losses kWh consumed ANSWER DOWNLOAD EXAMIANS APP
Current Electricity Voltage dependent resistors are usually made from Charcoal Nichrome Silicon carbide Graphite Charcoal Nichrome Silicon carbide Graphite ANSWER DOWNLOAD EXAMIANS APP
Current Electricity If the number of valence electrons of an atoms is less than 4,the substance is usually A semiconductor None of the listed here A conductor An insulator A semiconductor None of the listed here A conductor An insulator ANSWER DOWNLOAD EXAMIANS APP
Current Electricity A wire having very high value of conductance is said to be Moderately good conductor None of the listed here Very good conductor Insulator Moderately good conductor None of the listed here Very good conductor Insulator ANSWER DOWNLOAD EXAMIANS APP
Current Electricity In an electric kettle water boils in 10 m minutes. It is required to boil the boiler in 15 minutes, using same supply mains None of these Length of heating element should be decreased Length of heating element should be increased Length of heating element has no effect on heating if water None of these Length of heating element should be decreased Length of heating element should be increased Length of heating element has no effect on heating if water ANSWER DOWNLOAD EXAMIANS APP
Current Electricity When current flows through heater coil it glows but supply wiring does not glow because Supply wires are made of superior material Resistance of heater coil is more than the supply wires Supply wiring is covered with insulation layer Current through supply line flows at slower speed Supply wires are made of superior material Resistance of heater coil is more than the supply wires Supply wiring is covered with insulation layer Current through supply line flows at slower speed ANSWER DOWNLOAD EXAMIANS APP
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