Calculate the current flowing through a wire of resistance 5 Ω connected to a battery of potential difference 3 volt.
Two resistors of resistance 5Ω and 15Ω are connected in parallel to a 15 volt battery. Find the current across 5Ω resistor.
A potentiometer wire has length 10 m and resistance 10Ω. It is connected to a battery of EMF 11 volt and internal resistance 1Ω, then the potential gradient in the wire is