Current Electricity In which of the following substances the resistance decreases with increase in temperature? Silver Constantan Copper Carbon Silver Constantan Copper Carbon ANSWER DOWNLOAD EXAMIANS APP
Current Electricity Three identical resistors are first connected in parallel and then in series. The resultant resistance of the first combination to the second will be 9 times 3 times 1/9 times 1/3 times 9 times 3 times 1/9 times 1/3 times ANSWER DOWNLOAD EXAMIANS APP
Current Electricity When one lag of parallel circuit is opened out the total current will Increases None of the listed here Decreases Become zero Increases None of the listed here Decreases Become zero 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 A conductor None of the listed here A semiconductor An insulator A conductor None of the listed here A semiconductor ANSWER DOWNLOAD EXAMIANS APP
Current Electricity With rise in temperature the resistance of pure metals Decreases Increases Remains constant First increases and then decreases Decreases Increases Remains constant First increases and then decreases ANSWER DOWNLOAD EXAMIANS APP
Current Electricity Resistance of a material always decreases if Temperature of material is increased Number of free electrons available becomes more None of these Temperature of material is decreased Temperature of material is increased Number of free electrons available becomes more None of these Temperature of material is decreased ANSWER DOWNLOAD EXAMIANS APP
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