Current Electricity Out of the following which is not a poor conductor? Copper Tungsten Cast iron Carbon Copper Tungsten Cast iron Carbon 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 Supply wiring is covered with insulation layer Resistance of heater coil is more than the supply wires Current through supply line flows at slower speed Supply wires are made of superior material Supply wiring is covered with insulation layer Resistance of heater coil is more than the supply wires Current through supply line flows at slower speed ANSWER DOWNLOAD EXAMIANS APP
Current Electricity Semiconductors have _______temperature co-efficient of resistance. None of the listed here Negative Zero Positive None of the listed here Negative Zero Positive ANSWER DOWNLOAD EXAMIANS APP
Current Electricity The resistance of a straight conductor is independent of Temperature Material Shape of cross-section Cross-sectional area Temperature Material Shape of cross-section Cross-sectional area ANSWER DOWNLOAD EXAMIANS APP
Current Electricity Resistance of a material always decreases if Temperature of material is increased Temperature of material is decreased Number of free electrons available becomes more None of these Temperature of material is increased Temperature of material is decreased Number of free electrons available becomes more None of these ANSWER DOWNLOAD EXAMIANS APP
Current Electricity Are the materials having electrical conductivity much less than most of the metals but much greater than that of typical insulators. Semiconductors Thermistor Variable resistors Varistors Semiconductors Thermistor Variable resistors Varistors ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS