Current Electricity The hot wire of electric bulb's filament is higher than its cold resistance because the temperature co-efficient of filament is None of the listed here Zero Negative Positive None of the listed here Zero Negative Positive ANSWER DOWNLOAD EXAMIANS APP
Current Electricity The resistance of a few meters of wire conductor in closed electrical circuit is Practically zero Very high Low High Practically zero Very high Low High ANSWER DOWNLOAD EXAMIANS APP
Current Electricity The insulation on a current carrying conductor is provided None of above factors To prevent shock Both of the listed here To prevent leakage of current None of above factors To prevent shock Both of the listed here To prevent leakage of current ANSWER DOWNLOAD EXAMIANS APP
Current Electricity Current velocity through a copper conductor is nearly 3 x 108 m/s of the order of a few ^.s/m independent of current strength the same as propagation velocity of electric energy nearly 3 x 108 m/s of the order of a few ^.s/m independent of current strength the same as propagation velocity of electric energy ANSWER DOWNLOAD EXAMIANS APP
Current Electricity Two bulbs of 500 W and 200 W rated at 250 V will have resistance ratio as 5 : 2 4 : 25 25 : 4 2 : 5 5 : 2 4 : 25 25 : 4 2 : 5 ANSWER DOWNLOAD EXAMIANS APP
Current Electricity Resistance of a material always decreases if Temperature of material is increased Number of free electrons available becomes more None of these Temperature of material is decreased Temperature of material is increased Number of free electrons available becomes more None of these Temperature of material is decreased ANSWER DOWNLOAD EXAMIANS APP
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