Please enable JavaScript.
Coggle requires JavaScript to display documents.
electric current and circuits ((STRENGHT OF MAGNETIC FIELD OF SOLENOID IS…
electric current and circuits
consists of a cell or battery source of electricity
MAGNETIC EFFECT CURRENT CARRYING COIL OF WIRE PRODUCES A MAGNETIC FIELD AROUND IT KNOWN AS MAGNETIC EFFECT OF CURRENT
DUE TO THIS THE CURRENT COULD DEFLECT COMPASS NEEDLE ELECTRIC CURRENT =MAGNETIC
EXAMPLES RADIO,TELEPHONE AND ELECTRIC MOTOR
SWITCH CONNECTS AND BREAKS A CIRCUIT
STRENGHT OF THE MAGNETIC FIELD DUE TO CURRENT FLOWING IN THE CONDUCTOR (RADIO) CAN BE INCREASED .LONG WOUNDING COIL OF CONDUCTOR IS A SOLENOID
STRENGHT OF MAGNETIC FIELD OF SOLENOID IS INCREASED BY INCREASING COIL TURNS IN A WIRE ,BY INCREASING CURRENT IN THE COIL,AND BY WINDING A CONDUCTING WIRE AROUND A MAGNETIC METIRIAL
ADVANTAGE OF ELECTROMAGNET IS THAT IT CANBE SWITCHED ON AND OFF BUT DISADVANTAGE IS THAT IT NEEDS CONTINOUS USPPLY OF CURRENT THEY ARE USED IN BELLS ,DOOR LOCKS ETC
ELECTROMAGNET IS A COIL OF INSULATED FLEXIBLE WIRE WOUND AROUND A MAGNETIC METIRIAL LIKE IRON AND IT WILL BE AS A MAGNET UNLESS CURRENT PASSES THROUGH IT WHEN CURRENT IS SWITCHED OF COIL LOOSES ITS MEGNETISM
MAGNETIC FIELD STRENGHT CAN BE INCRESED BY BY INCREASING TURNS OF COIL OVER A GIVEN LENGHT LIKE THIS IT EVEN IS CAPABLE OF LIFTING HEAVY LOADS
when current passes through a conductor it gets hot this heating is because of the resistance of conductor this is called THE HEATING EFFECT OF CONDUCTOR
AMOUNT OF HEAT PRODUCED=MATERIAL ,LENGHT AND THICKNESS EXAMPLES INCLUDE TOASTER ,GEYSER ,HOT PLATE ,ROOM HEATER ETC
ELECTRICAL RESISTANCE SOURCE LIKE BULB
path carrying out movement of charges i.e.A WIRE
BULB CONVERTS electrical energy to heat energy and light energy.
DRAWING CIRCUIT USING SIMPLE CIRCUIT SYMBOLS KNOWN AS CIRCUIT DIAGRAM
THESE APLLIANCES HAVE HEATING COILS OF HIGH RESISTANCE WIRE
WHEN SOURCE OF ELECTRICITY LIKE CELL IS CONNECTED TO THE APPLIANCE LARGE AMONTS HEAT IS PRODUCED DUE TO THE HIGH RESISTANCE BUT THE WIRES CONNECTED DOESNT GET ANY HEAT AS ITS OF LOW RESISTANCE
HEATING OF CONDUCTOR INCREASES WITH TIME AND INCREASE IN CURRENT AND ALSO INCREASE IN RESISTANCE
SIMPLE CIRCUIT CAN BE MADE MORE SIMPLE BY DRAWING IT USING CIRCUIT SYMBOLS RATHER THAN WITH DIFFICULT PICTURES OF A CIRCUIT
MCBS (MINIATURE CIRCUIT BREAKERS ARE SWITCHES THAT OPEN THE CIRCUIT WHEN FLO W OF CURRENT IN A CIRCUIT GOES MORE THAN IT SHOULD OR (ITS SAFE LIMIT)
MCBS SWITCH ON ON THEIR OWN AFTER REMOVING OVERLOAD OR WHEN CURRENT IS BACK TO ITS SAFE LIMIT