why all the bulbs were switched on by pressing one switch
Answers
Answer:
The bulbs are connected with only the same wire. That's why. And this type is called parallel.
Answer:
Explanation:
Bulbs can be set to turn on with any amount of switches desired, as the only use for the switch is to interrupt the current flow so the bulb can be turned on and off, and for obvious reasons (cost and comfort) only one is used, let me give you an example, there’s one application which makes two switches better than one.
Stairs, a bulb located in a staircase will normally use two switches, one in each end of the staircase, so there’s no need to go back down or up to turn on or off:
Using two way switches you can turn on and off the bulb in each end of the staircase, it does not matter in which position the other switch is, toggling one switch will do the job.