Top 10, 10th Sci. Effects of electric current...ЁЯО╖ Touch the blue link below to join this What's App group of your рдоाрд╣िрддी рд╡िрдЬ्рдЮाрдиाрдЪी ЁЯО╖ЁЯСЗ ЁЯСЙ рдоाрд╣िрддी рд╡िрдЬ्рдЮाрдиाрдЪी ЁЯО╖ * How do we decide that a given the material a good conductor of electricity or is it an insulator ? Ans. A material having very low electrical resistance is called good conductor of electricity. Copper Cu, Gold Au, Silver Ag, Aluminium Al these are good conductors of electricity because free electrons are present in there last orbit. Material having extremely high electrical resistance is called an insulator. Glass, wood, rubber, and plastic are electrically insulator because they do not have free electrons in their final orbitals. * Heating effect of electric current When a resistor is connected to an electric circuit, heat is produced in that resistor due to the current. This is known as the heating effect of the current. Electric bulb, electric heater, electric cooker, fuse wire these instrum...