Education

4. EIECTRICITY PLAYS A VERY IMPORTANT ROLE IN
OUR DAILY LIFE . IT IS A FORM OF ENERGY THAT
HELPS US IN MANY WAYS. MOST OF THE
COMFORTS OF MODERN LIFE WOULD NOT BE
THERE, IF THERE IS NO ELECTRICITY.
THE ELECTRICITY THAT WE USE IN OUR
HOUSES, SCHOOLS & FACTORIES IS OBTAINED
THROUGH POWER STATIONS . WE GET A
SMALL AMOUNT OF ELECTRICITY THROUGH
BATTERIES & CELLS.
THE ELECTRIC POWER THUS PRODUCED IS
USED THROUGH CIRCUITS & CONTROLLED BY
SWITCHES.

5. FLOW OF CURRENT REQUIRES A
CLOSED CODUCTING PATH. THIS PATH
MADE BY CONNECTING A CELL OR A
BATTERY, A SWITCH & A BULB BY
MEANS OF WIRES. THIS CLOSED
CONDUCTING PATH IS KNOWN AS AN
ELECTRIC CIRCUIT.

6.  SIMPLE CIRCUITS
 SERIES CIRCUITS
PARALLEL CIRCUITS

7. A CIRCUIT MADE UP OF A CELL , A
SWITCH & A BULB IS KNOWN AS A
SIMPLE CIRCUIT.
WHEN THE SWITCH IS PUT ON, THE BULB
GLOWS . THIS IS BECAUSE THERE IS A
CONTINUOUS OR CLOSED PATH FOR THE
ELECTRIC CURRENT FLOW.

8. THE FIRST CIRCUIT AS DESCRIBED ABOVE IS GIVEN HERE .
WHEN YOU LOOK AT THE CIRCUIT , IT IS OBVIOUS THAT THE
BULBS ARE CONNECTED END TO END . THIS TYPE OF
CIRCUIT IS KNOWN AS SERIES CIRCUIT . HERE THE
CURRENT CAN FLOW ONLY IN ONE DIRECTION & THE SAME
AMOUNT OF ELECTRIC CURRENT FLOWS THROUGH ALL THE
BULBS .
WHAT HAPPENS WHEN ONE OF THE BULBS IN THE CIRCUIT
IS REMOVED OR FUSES OFF ? THE OTHER BULBS WILL NOT
GLOW BECAUSE THE CIRCUIT IS NOT COMPLETE NOW .

9. BSERVE THE SECOND CIRCUIT. HERE EACH
BULB IS CONNECTED TO THE BATTERY
TERMINALS BY SEPARATE WIRES. THIS TYPE
OF CIRCUIT IS KNOWN AS PARALLEL CIRCUIT
. IN THIS CIRCUIT DIFFERENT AMOUNT OF
CURRENT PASSES THROUGH THE BULBS.
WHAT HAPPENS WHEN ONE OF THE BULBS IN
THE CIRCUIT IS RRMOVED OR FUSES OFF ?
THE OTHER BULBS WILL GLOW BECAUSE
THEY HAVE SEPARATE CONDUCTING PATHS.