Situation-1
Materials required:
Dry cell -1, Small bulb-1 (torch light bulb or LED), Switch and Connecting wire.
Procedure :
Take a dry cell, small bulb or LED and switch. Connect them in a simple circuit using copper wireas shown fig.. Switch ON and observe the brightness of light
.Situation-2
(Bulbs connected in series):
Materials required:
Electric cell -1, Small bulbs -2 (torch light bulb or LED), Switch and Copper wire.
Procedure :
Take two small bulbs or LED’s, cell and switch
Connect them using copper wire as shown in fig. Switch ON and observe the brightness of the bulbs. Remove one bulb and observe the condition of another bulb.
Situation-3
(Bulbs connected in Parallel):
Materials required: Electric cell -1, small bulb -2 (torch light), Switch, Copper wire
Procedure:
Take two small bulbs, a cell and a switch. Connect them using copper wire as shown in fig. Switch ON and observe the brightness of the bulbs.
Remove one bulb and observe the condition of another bulb.
From the table, if a number of bulbs are connected in series the brightness of the bulb is reduced. If one of the bulbs is removed or broken, the circuit becomes open and the second bulb will not glow. If the number of bulbs are connected in parallel the brightness of the bulb remains same. Even if one of the bulb Is removed or broken, the circuit remains same and the bulb will glow as usual, but the battery drains faster.
