22-05-2012, 04:09 PM
PHYSICS PROJECT WORK
PHYSICS PROJECT WORK.doc (Size: 99 KB / Downloads: 111)
OBJECTIVE:
TO DEMONSTRATE THAT TWO PARALLEL CONDUCTORS CARRYING ELECTRIC CURRENT IN SAME DIRECTION ATTRACT EACH OTHER.
APPARATUS:
ROGET’S VIBRATING SPIRAL(COIL) APPARATUS CONSISTING OF A FLEXIBLE COPPER COIL HANGING FROM AN IRON STAND HAVING HEAVY BROAD BASE ,A BRASS TERMINAL INSIDE THE MERCURY , A SECOND BRASS TERMINAL AT THE BASE – BOTH TERMINALS ARE INSULATED FROM THE BASE,A CELL , A ONE WAY KEY .
PROCEDURE (Stepwise):-
1-Arrange the apparatus Vertical and stable.
2-adjust the height of spiral (hanging coil) so that its lower tip just touches the mercury.
3-connect a cell and a one way key between the two terminals t1 and t2 (which are insulated from the base).
4-insert the key and watch. An electric current flows through the coil.
OBSERVATION:
1-ITS TIP DIPPED IN MERCURY MOVES UP OUT OF MERCURY DUE TO ATTRACTIO N BETWEEN CLOSE TURNS OF THE COIL IN WHICH CURRENT FLOWS IN SAME DIRECTION. CONTACT BETWEEN COIL TIP MERCURY BREAKS. CURRENT BECOMES ZERO. THE COIL END MOVES DOWN DUE TO WEIGHT OF COIL. CONTACT IS AGAIN MADE AND CURRENT AGAIN FLOWS THROUGH COIL.
RESULT:
THE VIBRATION OF THE COIL DEMONSTRATES ATTRACTION BETWEEN CLOSE TURNS OF THE COIL.THE FACT IS PROVED.
THEORY:
WHEN AN ELECTRIC CURRENT FLOWS THROUGH TWO PARALLEL CONDUCTORS IN SAME DIRECTION, CONDUCTORS ATTRACT EACH OTHER.
AND GATE:
THE AND GATE MAY HAVE TWO OR MORE INPUTS BUT THERE IS ONLY ONE OUTPUT. WHEN BOTH OF THE INPUT SIGNAL IN THE HIGH STATE THE LOGIC GATE DECIDE TO MAKE THE OUTPUT SIGNAL “HIGH”.
EXPERIMENT:
In this circuit two switches s-1& s-2 are connected in series when any one of these two switches is left open then the electric path to the bulb is broken and the bulb fail to light up. It is necessary to close both the switches s-1 s-2 in order to complete the electric path which will enable the bulb to light.
Working:
How does the and gate react to the situation when any one or more of its input component are false in “AND GATE” function statement?
Well, in all such situation where any one or more of the inputs to the AND GATE are at logic level ‘0’then the AND GATE decides to keep the output logic at low level. it means that there is only one situation where output can be kept at high level.