NEET Exam  >  NEET Questions  >  A potentiometer consist of a wire of length ... Start Learning for Free
A potentiometer consist of a wire of length 400 cm and of resistance 10 ohm. it is connected to a cell of e.m.f 2 volt Having negligible internal Resistance . calculate the potential difference per unit length of the wire ???
Most Upvoted Answer
A potentiometer consist of a wire of length 400 cm and of resistance ...
Calculating the Potential Difference per Unit Length in a Potentiometer

In order to calculate the potential difference per unit length in a potentiometer, we need to consider the following information:

Given:
- Length of the wire (L) = 400 cm
- Resistance of the wire (R) = 10 ohm
- Electromotive force (EMF) of the cell (E) = 2 volts
- Negligible internal resistance of the cell

Formula:
The potential difference per unit length (V) in a potentiometer is given by the formula:
V = E * (R / L)

Solution:
Using the given values, we can calculate the potential difference per unit length as follows:

Step 1: Convert the length of the wire from centimeters to meters:
L = 400 cm = 4 meters

Step 2: Substitute the given values into the formula:
V = 2 * (10 / 4) = 2 * 2.5 = 5 volts

Therefore, the potential difference per unit length in the potentiometer is 5 volts.

Explanation:
The potentiometer consists of a wire that acts as a variable resistor. When a cell with an EMF of 2 volts is connected to the potentiometer, a potential difference is set up across the wire. The potential difference per unit length is directly proportional to the resistance of the wire.

In this case, the wire has a length of 4 meters and a resistance of 10 ohms. By applying the formula V = E * (R / L), we can calculate the potential difference per unit length. The result is 5 volts, indicating that for every meter of wire, there is a potential difference of 5 volts.

This potential difference is used to measure unknown emf or potential difference across a circuit element. By sliding a jockey along the wire and finding the position where the potential difference across the jockey is zero, the unknown potential difference can be determined.

Overall, the potential difference per unit length in a potentiometer is an important parameter for measuring and comparing electrical potentials in a circuit.
Community Answer
A potentiometer consist of a wire of length 400 cm and of resistance ...
I think question is incomplete
Attention NEET Students!
To make sure you are not studying endlessly, EduRev has designed NEET study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in NEET.
Explore Courses for NEET exam

Similar NEET Doubts

Top Courses for NEET

A potentiometer consist of a wire of length 400 cm and of resistance 10 ohm. it is connected to a cell of e.m.f 2 volt Having negligible internal Resistance . calculate the potential difference per unit length of the wire ???
Question Description
A potentiometer consist of a wire of length 400 cm and of resistance 10 ohm. it is connected to a cell of e.m.f 2 volt Having negligible internal Resistance . calculate the potential difference per unit length of the wire ??? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about A potentiometer consist of a wire of length 400 cm and of resistance 10 ohm. it is connected to a cell of e.m.f 2 volt Having negligible internal Resistance . calculate the potential difference per unit length of the wire ??? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A potentiometer consist of a wire of length 400 cm and of resistance 10 ohm. it is connected to a cell of e.m.f 2 volt Having negligible internal Resistance . calculate the potential difference per unit length of the wire ???.
Solutions for A potentiometer consist of a wire of length 400 cm and of resistance 10 ohm. it is connected to a cell of e.m.f 2 volt Having negligible internal Resistance . calculate the potential difference per unit length of the wire ??? in English & in Hindi are available as part of our courses for NEET. Download more important topics, notes, lectures and mock test series for NEET Exam by signing up for free.
Here you can find the meaning of A potentiometer consist of a wire of length 400 cm and of resistance 10 ohm. it is connected to a cell of e.m.f 2 volt Having negligible internal Resistance . calculate the potential difference per unit length of the wire ??? defined & explained in the simplest way possible. Besides giving the explanation of A potentiometer consist of a wire of length 400 cm and of resistance 10 ohm. it is connected to a cell of e.m.f 2 volt Having negligible internal Resistance . calculate the potential difference per unit length of the wire ???, a detailed solution for A potentiometer consist of a wire of length 400 cm and of resistance 10 ohm. it is connected to a cell of e.m.f 2 volt Having negligible internal Resistance . calculate the potential difference per unit length of the wire ??? has been provided alongside types of A potentiometer consist of a wire of length 400 cm and of resistance 10 ohm. it is connected to a cell of e.m.f 2 volt Having negligible internal Resistance . calculate the potential difference per unit length of the wire ??? theory, EduRev gives you an ample number of questions to practice A potentiometer consist of a wire of length 400 cm and of resistance 10 ohm. it is connected to a cell of e.m.f 2 volt Having negligible internal Resistance . calculate the potential difference per unit length of the wire ??? tests, examples and also practice NEET tests.
Explore Courses for NEET exam

Top Courses for NEET

Explore Courses
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
10M+ students study on EduRev