Current Electricity What voltage drop will be there across a 1 kW electric heater whose resistance when hot is 40 Ω? 150 V 200 V 100 V 50 V 150 V 200 V 100 V 50 V ANSWER DOWNLOAD EXAMIANS APP
Current Electricity In which of the following substances the resistance decreases with increase in temperature? Carbon Copper Constantan Silver Carbon Copper Constantan Silver ANSWER DOWNLOAD EXAMIANS APP
Current Electricity Resistance of a material always decreases if Temperature of material is decreased None of these Number of free electrons available becomes more Temperature of material is increased Temperature of material is decreased None of these Number of free electrons available becomes more Temperature of material is increased ANSWER DOWNLOAD EXAMIANS APP
Current Electricity International ohm is defined in terms of the resistance of The unit length of wire A cube of copper A cube of carbon A column of mercury The unit length of wire A cube of copper A cube of carbon A column of mercury ANSWER DOWNLOAD EXAMIANS APP
Current Electricity Constantan wire is used for making starndard resistance because it has Negligibly small temperature co-efficient of resistance Low specific resistance High melting point High specific resistance Negligibly small temperature co-efficient of resistance Low specific resistance High melting point High specific resistance ANSWER DOWNLOAD EXAMIANS APP
Current Electricity A wire having very high value of conductance is said to be Very good conductor Moderately good conductor Insulator None of the listed here Very good conductor Moderately good conductor Insulator None of the listed here ANSWER DOWNLOAD EXAMIANS APP
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