Choose the correct alternative: Alloys usually have much (lower/higher) temperature coefficients of resistance than pure metals.

Choose the correct alternative from the blacket:- Alloys of metals usually have _________(greater or less)resistivity than that of their constrituent metals.

Choose the correct alternative from the brackets:- A heat sensitive resistor whose resistance varies appreciably with temperature is known as a ________ (Rheostat / Thermistor).

Choose the correct alternative: The resistivity of alloy manganin (is nearly indepent of / increases rapidly) with increase of temperature.

In superconducters, resistance drops suddenly to zero at a sufficiently low temperature called ________ .Metals have_________ temperature coefficient of resistance.

Choose the correct alternative: The resistivity of a typical insulator (e.g. amber) is greater than that of a metal by a factor of the order of ( 10^(22) / 10^3 )

Choose the correct alternative from the bracket.:- (AC current//choke coil) is a pure inductor used to reduce the alternating current without the wastage of energy.