Which part of an incandescent bulb gets heated first?
When we switch ‘ON’ an incandescent bulb, after some time the bulb would become hot.
Statement 1: It is observed that sometimes an incandescent bulb glows brighter and sometimes it glows dim.
Statement 2: Glowing brighter and dimmer depends on heating effect of current. More current produces more heating effect making the bulb glow brighter and vice-versa.
An incandescent bulb works on which of the following principles: