The aim of the experiment
Experiment with the tools
Meter bridge (slide wire bridge) - A Leclanche cell (battery eliminator)- A
galvanometer- A resistance box - A jockey- A one-way key- A
resistance wire- A screw gauge- A meter scale- A set square
Connecting wires- A piece of sandpaper
Steps to conduct the experiment
Arrange the required materials on a table and make the connections as per
the connections diagram.
Connect the resistance wire in the left gap (between c & d) and resistance
box in the right gap.
Introduce some resistance in the circuit by taking out some resistance from
the resistance box.
Plug the key. Bring the jockey in contact with the end A first, and then with
C. Note the deflection on the galvanometer.
If the galvanometer deflects in the opposite direction, the connections are
right and the null point is in between A and C.
If not so, change the resistance in the resistance box and repeat the process
so that the null point is somewhere between A and C.
If the galvanometer deflected towards a single side, then check the
connection.
Now, slide the jockey slowly over the wire starting from one and (say, A) and
note the galvanometer deflection. Continue the process till the balancing
point is reached.
Balancing point is the point at which the galvanometer shows zero
deflection. Now, note the position of the jockey from end A. Take it as the
balancing length (l) using the meter scale.
Repeat the process for different values of R. The balancing length is
measured each time.
Now, interchange the position of resistance wire and resistance box in gaps
AB and CD.
Measurements and results
تعليقات
إرسال تعليق