1.

Keeping the switch in the off postion touch the bulb to see how warm it is.now press the switch to the on position .touch the bulb aftrr a few second .what do you find? has the bulb become warmer

Answer»

e SWITCH is off no change in the TEMPERATURE of bulb is experiencedbut when the switch is in on position the heating effect is experienced by US on touching the bulb the bulb becomes warmerbecause when electric current flows through a conductor it produces heat asheat is directly PROPORTIONAL to square of amount of the electric currentheat is directly proportional to time takenheat is directly proportional to resistance of the conductor



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