Current Electricity In which of the following substances the resistance decreases with increase in temperature? Constantan Silver Carbon Copper Constantan Silver Carbon Copper ANSWER DOWNLOAD EXAMIANS APP
Current Electricity A thermistor has Zero temperature coefficient Variable temperature coefficient Positive temperature coefficient Negative temperature coefficient Zero temperature coefficient Variable temperature coefficient Positive temperature coefficient Negative temperature coefficient ANSWER DOWNLOAD EXAMIANS APP
Current Electricity At 0 K, germanium behaves as A superconductor A ferromagnetic substance A conductor An insulator A superconductor A ferromagnetic substance A conductor An insulator ANSWER DOWNLOAD EXAMIANS APP
Current Electricity The resistance of a straight conductor is independent of Shape of cross-section Material Temperature Cross-sectional area Shape of cross-section Material Temperature Cross-sectional area ANSWER DOWNLOAD EXAMIANS APP
Current Electricity If the number of valence electrons of an atoms is less than 4,the substance is usually None of the listed here A semiconductor An insulator A conductor None of the listed here A semiconductor An insulator A conductor ANSWER DOWNLOAD EXAMIANS APP
Current Electricity Which of the following materials has the least resistivity ? Copper Zinc Lead Mercury Copper Zinc Lead Mercury ANSWER DOWNLOAD EXAMIANS APP