Equivalent Resistance of Rresistors Parallel Materials Required
A metre bridge, A Leclanche cell, a galvanometer, a resistance box and a jockey
Take a connecting wire and connect one end to the positive terminal of the Leclanche
cell or battery and the other end to the metre bridge terminal A.
Take another wire and connect one end to the negative terminal of the cell and the other
end to the one of the terminal of the key.
Remove the key.
Take the connecting wire and connect one end to the the other terminal of the key and the
other end to the terminal B of the metre bridge.
The resistance box is connected between the terminal of the left gap of the metre bridge
with two wires.
Take another wire and connect to the positive terminal of the galvanometer and other to
the central terminal of the metre bridge.
Take another wire and connect one end to the negative terminal of the galvanometer and
the other end to the jockey.
Resistance wire, r1 Connect the resistance wire, r1 between the
terminals of the right gap of the metre bridge.
Ensure that the resistance wire just touches the terminal.
Insert the key and take 5 ohm resistance from the resistance box and then slides the jockey
over the metre bridge wire until the galvanometer shows null deflection.
Measure the balancing length from the end A. ie, 50 cm
Resistance Wire, r2 connect the resistance wire, r2 between the
terminals of the right gap of the metre bridge.
Insert the key and take 5 ohm resistance from the resistance box and then slides the jockey
over the metre bridge wire until the galvanometer shows null deflection.
Measure the balancing length from the end A. ie, 55.5 cm
r1 and r2 in series take two resistance wires r1 and r2 which
are in parallel and connect it between the terminals of the right gap of the metre bridge.
Insert the key and take 5 ohm resistance from the resistance box and then slides the jockey
over the metre bridge wire until the galvanometer shows null deflection.
Measure the balancing length from the end A. ie, 42.6 cm
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