Is there a positive and negative on a light bulb?
Is there a positive and negative on a light bulb? At the very end of the light bulb is the small round tip which is the positive contact surface. The outer threaded part of the base is the negative connection contact surface. These two parts are generally insulated by the glass base of the light bulb. What 2 places must you touch a bulb for it to light? The final two arrangements that lead to a lit light bulb involve placing the bulb at the negative terminal of the cell, either by making contact to it with the ribbed edge...