Current Electricity Which of the following material has nearly zero temperature co-efficient of resistance? Manganin Copper Porcelain Carbon Manganin Copper Porcelain Carbon ANSWER DOWNLOAD EXAMIANS APP
Current Electricity With rise in temperature the resistance of pure metals Increases First increases and then decreases Remains constant Decreases Increases First increases and then decreases Remains constant Decreases ANSWER DOWNLOAD EXAMIANS APP
Current Electricity Two lamps 100 W and 40 W are connected in series across 230 V (alternating). Which of the following statement is correct? 100 W lamp will glow brighter 40 W lamp will fuse 40 W lamp will glow brighter Both lamps will glow equally bright 100 W lamp will glow brighter 40 W lamp will fuse 40 W lamp will glow brighter Both lamps will glow equally bright ANSWER DOWNLOAD EXAMIANS APP
Current Electricity A closed switch has a resistance of About 50 ohms About 500 ohms Zero Infinity About 50 ohms About 500 ohms Zero Infinity ANSWER DOWNLOAD EXAMIANS APP
Current Electricity A wire having very high value of conductance is said to be Moderately good conductor Very good conductor Insulator None of the listed here Moderately good conductor Very good conductor Insulator None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Current Electricity The electrical energy required to heat a bucket of water to a certain temperature is 4 kWh. If the heat losses are 20 percent, the energy input is 3.2 kWh 6 kWh 2 kWh 5 kWh 3.2 kWh 6 kWh 2 kWh 5 kWh ANSWER DOWNLOAD EXAMIANS APP
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