Physics Two metallic wires made from copper have same length but the radius of wire 1 is half of that of wire 2. The resistance of wire 1 is R. If both the wires are joined together in series, the total resistance becomes 5R/4 2R R/2 3R/4 5R/4 2R R/2 3R/4 ANSWER DOWNLOAD EXAMIANS APP
Physics How much mechanical work must be done to completely melt 1 gram of ice at 0°C ? 4.2 J 80 J 336 J 2268 J 4.2 J 80 J 336 J 2268 J ANSWER DOWNLOAD EXAMIANS APP
Physics Newton's first law of motion gives the concept of Work Energy Inertia Momentum Work Energy Inertia Momentum ANSWER DOWNLOAD EXAMIANS APP
Physics A colour-blind person cannot See distant objects Distinguish between certain colours Have persistence of vision See black colour See distant objects Distinguish between certain colours Have persistence of vision See black colour ANSWER DOWNLOAD EXAMIANS APP
Physics A transformer Converts DC to AC Converts AC voltage to D.C. voltage Converts electrical energy into mechanical energy Is used to decrease or increase AC voltage Converts DC to AC Converts AC voltage to D.C. voltage Converts electrical energy into mechanical energy Is used to decrease or increase AC voltage ANSWER DOWNLOAD EXAMIANS APP
Physics The plastic material commonly used for making gear wheels is Polyesters Polystyrene Nylons Bakelit Polyesters Polystyrene Nylons Bakelit ANSWER DOWNLOAD EXAMIANS APP
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