Calculate the current
through the galvanometer when a potential difference of 10 V is maintained
across AC as shown in the image.
SOLUTION:
KIRCHHOFF'S SECOND LAW:
Kirchhoff's subsequent(second) law is otherwise called Voltage law (OR) Loop law.This law depends on LAW OF CONSERVATION OF ENERGY.Kirchhoff's subsequent law expresses that " THE ALGEBRAIC SUM OF ALL THE POTENTIAL DIFFERENCES ALONG A CLOSED LOOP IS ZERO".
CONVENTIONS:
Accept any course (direction) as the heading of traversal (direction of traversal). (Either clockwise or anticlockwise)
EMF of the cell is POSITIVE in the event that the bearing of the crossing (direction of the traversal) is from its NEGATIVE terminal to POSITIVE terminal. (NPP)
EMF of the cell is NEGATIVE assuming the heading of the crossing (direction of the traversal) is from its POSITIVE terminal to NEGATIVE terminal of the battery. (PNN)
The IR item is taken as POSITIVE on the off chance that the resistor is crossed a similar way as the expected to be current. (If the resistor is traversed in the same direction as the assumed current.)
POTENTIOMETER EXPERIMENT- INTERNAL RESISTANCE OF A PRIMARY CELL CIRCUIT DIAGRAM : AB- Potentiometer Rh-Rheostat L - Lechlanche cell H.R-High resistance G- Galvanometer R-Known Resistance J- Pencil Jockey positions Bt -Battery Eliminator (3 amps.) K- Plug keys SIMPLE CIRCUIT DIAGRAM EXPERIMENTAL SET UP FORMULA TABULAR COLUMN & OBSERVATION: PROCEDURE: The circuit connections and the experimental set up are made as shown in the previous page. In the open circuit,when resistance is not included, the emf of the cell is deterimned by noting the balncing length. In the closed circuit, when the resistance is included the balncing length is to be noted. The experiment is r epeated fo r different values of R and the readings are tabulated. Using the formula the internal resistance of the given cell can be calculated . RESULT: ...
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