A wire of resistance `2.20 Omega` has a length `2m`. Calculate the length of the similar wire which connected in parallel with `2m` length wire will give a resistance of `2.0 Omega`

A resistance of a metal wire of length AB is 2Omega . Another wire of length PQ of te same metal with twice the diameter of the wire AB is found to hage the same resistance of 2Omega . What is the length of PQ?

What should be the length of a nichrome wire of resistance 4.5 Omega , if the length of a similar wire is 60 cm and resistance 2.5 Omega ?

A potentiometer wire has a resistance of 20 Omega and length 10 m. It is connected in series with a battery of emf 2.5 V and negligible internal resistance, and an external resistance of 5 Omega . Fall of potential in mV per metre is

A piece of wire of resistance 20 Omega is drawn so that its length is increased to twice is original length. Calculate resistance of the wire in the new situation.

A wire has resistance of 2.0 Omega at 25^@ C and 2.5 Omega at 100^@ C . Calculate the temperature coefficient of resistance of the wire.

A wire of length 3 m connected in the left gap of a metre bridge balances a 8 Omega resistance in the right gap at a point, which divides the bridge wire in the ratio of 3 :2 . What is the length of the wire corresponding to a resistance of the length of the wire corresponding to a resistance of 1 Omega ?

A wire has a resistance of 16 Omega . It is melted and drawn into a wire of half its length. Calculate the resistance of the new wire. What is the percentage change in its resistance ?