Current Electricity The resistance of a copper wire 200 m long is 21 ω. If its thickness (diameter) is 0.44 mm, its specific resistance is around 1.4 x 10-8 ω-m 1.2 x 10-8 ω-m 1.6 x 10-8 ω-m 1.8 x 10-8 ω-m 1.4 x 10-8 ω-m 1.2 x 10-8 ω-m 1.6 x 10-8 ω-m 1.8 x 10-8 ω-m ANSWER DOWNLOAD EXAMIANS APP
Current Electricity An open resistor, when checked with an ohmmeter reads High but within tolerance Low but not zero Zero Infinite High but within tolerance Low but not zero Zero Infinite ANSWER DOWNLOAD EXAMIANS APP
Current Electricity The hot wire of electric bulb's filament is higher than its cold resistance because the temperature co-efficient of filament is Zero None of the listed here Positive Negative Zero None of the listed here Positive Negative ANSWER DOWNLOAD EXAMIANS APP
Current Electricity The filament of electrical bulb is made of Nickel Aluminium Tungsten Steel Nickel Aluminium Tungsten Steel ANSWER DOWNLOAD EXAMIANS APP
Current Electricity Semiconductors have _______temperature co-efficient of resistance. Zero Negative Positive None of the listed here Zero Negative Positive None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Current Electricity A closed switch has a resistance of About 500 ohms Zero About 50 ohms Infinity About 500 ohms Zero About 50 ohms Infinity ANSWER DOWNLOAD EXAMIANS APP
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