Magnetic field lines emerge from the North Pole and enter the South Pole outside the magnet. Inside, they move from South to North, forming continuous closed loops. They never intersect each other.
If you hold a current-carrying straight conductor in your right hand such that your thumb points towards the direction of current, then your fingers will wrap around the conductor in the direction of the magnetic field lines.
Our homes receive electricity through three wires: Live wire (positive potential, red), Neutral wire (zero potential, black), and Earth wire (green, for safety to prevent shocks by conducting leakage current to the ground).
What is Short-circuiting and Overloading? Short-circuiting occurs when the live and neutral wires come in direct contact, causing a massive surge of current. Overloading happens when too many appliances are connected to a single socket, drawing more current than the circuit can safely handle, often leading to fires.