List of top Physics Questions on Electricity asked in AP EAPCET

A potentiometer wire is 10m long and has a resistance of $18\,\Omega$. It is connected to a battery of emf 5V and internal resistance $2\,\Omega$. Calculate the potential gradient along the wire.

A wire of resistance $R$ is stretched to double its original length. Its new resistance will be

A wire is stretched to double its length. New resistance becomes: