How can you construct a standard resistance?

Constantan wire is used for making standard resistance, because it has......(a)High melting point (b)Low specific resistance (c)High specific resistance (d)Negligible temperature coefficient of resistance

Alloys like manganin, eureka, constantan etc. are used in making standard resistance coils. Why?

You are supplied with a 1m long uniform resistance wire of resistance 3Ω and a cell of emf 1.5v.Can you construct a potentiometer using 1m wire? If no, give reason, if yes, what is the least count of the arrangement?

Using a potentiometer how do you determine the internal resistance of a cell?

How can you charge a metal sphere positively without touching it?

Explain how can you convert Ethanol to acetaldehyde without further oxidation.

Explain how can you convert Ethanol to directly to Acetic acids.

Appropriate material to be used in the construction of resistance boxes out of the following is.....(a)Copper (b)Iron (c)Manganin (d)Aluminium

A dog expires CO_2 , How can you correlate the relationship between the dog and grazing cattle in terms of CO_2 .