Question

state joules law of heating. though same current flows through the electric wires and the filament of bulbs yet only the filament glows. why?

Answer 1

there are two laws :
Joule's first law shows the relation between heat generated by an electric current flowing through a conductor. It is named after James Prescott Jouleand shown as:

QI2⋅{\displaystyle Q=I^{2}\cdot R\cdot t}Where Q is the amount of heat, I is the electric current flowing through a conductor, R is the amount of electric resistance present in the conductor, andt is the amount of time that this happens for.

Joule's second law says that theinternal energy of an ideal gas does not change if volume and pressure change, but does change if temperature changes.

Thou same amount of electric current flow through electric wire and the electric bulb but only the filament of the bulb glow because filament of the bulb has high melting point and high resistance but the electric wire do not has high melting point and high resistance.