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Activity 2

The document outlines an experiment to study the relationship between potential drop and wire length for a steady current using a potentiometer and various electrical components. It details the apparatus, circuit assembly, procedure for measuring potential difference at different wire lengths, and emphasizes the importance of precautions during the experiment. The result indicates that the potential difference is proportional to the length of the wire for a uniform conducting wire carrying a steady current.

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anjelkeshari
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10 views2 pages

Activity 2

The document outlines an experiment to study the relationship between potential drop and wire length for a steady current using a potentiometer and various electrical components. It details the apparatus, circuit assembly, procedure for measuring potential difference at different wire lengths, and emphasizes the importance of precautions during the experiment. The result indicates that the potential difference is proportional to the length of the wire for a uniform conducting wire carrying a steady current.

Uploaded by

anjelkeshari
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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Aim: To study the variation in potential drop with length of a wire for a steady current.

APPARATUS

A potentiometer, key, battery, ammeter, voltmeter,, rheostat, a battery, connecting wires and
sand-paper.

CIRCUIT DIAGRAM

K Ra
A

X.

PROCEDURE
making the connections.
1. Assemble the circuit as shown. Clean the ends of the connecting wires before
X, in contact with the
2. Adjust the rheostat so as to introduce the maximum possible resistance. Place
resistance in the
wire at Y to get a reasonable value of potential difference. If necessary, adjust the
rheostat.
between X and Y, record the value of the len.,
3. By keeping the sliding contact X, at different positions
the current remain
"I of the wire and the corresponding potential difference V". Make sure that
wire.
constant during the experiment. Do not slide the contact on the
4. Plot a graph between Vand "". Observe shape of the graph and interpret the same.
S. No. Length of the wire ( cm) Potential Difference (V volts)

1. 250
2
3
3. 7So
4

6.
7.

8.

CalculatBu.. Potential gracieut K Y= tao O004


RESULT
For a conducting wire of uniform area of cross-section carrying a steady
current, the potential difference across a length of wire is proportional to the +Vvolts
length.
PRECAUTIONS
1. The ends of the connecting wires should be cleaned before
making
connections.
2. The connections should be neat and tight.
cm
3. The current should be passed for minimum possible
time.

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