Current Electricity The hot wire of electric bulb's filament is higher than its cold resistance because the temperature co-efficient of filament is Positive Negative Zero None of the listed here Positive Negative Zero None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Current Electricity The resistance of conductor varies inversely as Temperature Resistivity Length Area of cross-section Temperature Resistivity Length Area of cross-section ANSWER DOWNLOAD EXAMIANS APP
Current Electricity The substances which have a large number of free electrons and offer a low resistance are called Conductors Semi-conductors Insulators Inductors Conductors Semi-conductors Insulators Inductors ANSWER DOWNLOAD EXAMIANS APP
Current Electricity Which of the following material has nearly zero temperature co-efficient of resistance? Copper Manganin Porcelain Carbon Copper Manganin Porcelain Carbon ANSWER DOWNLOAD EXAMIANS APP
Current Electricity In which of the following substances the resistance decreases with increase in temperature? Copper Carbon Silver Constantan Copper Carbon Silver Constantan ANSWER DOWNLOAD EXAMIANS APP
Current Electricity A closed switch has a resistance of Zero Infinity About 500 ohms About 50 ohms Zero Infinity About 500 ohms About 50 ohms ANSWER DOWNLOAD EXAMIANS APP
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