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While doing an experiment Neeraj fixed a...

While doing an experiment Neeraj fixed a sheet of white paper on a drawing board. He placed a bar magnet in the centre of it. He sprinkled some iron filings uniformly around the bar magnet. Then he tapped the board gently and observed that the iron filings arranged themselves in a particular pattern.
Which of the following statements is correct about magnetic field strength?

A

Closer the lines, more will be the strength and farther the lines, lesser will be the field strength.

B

Closer the lines, less will be the strength and farther the lines, more will be the field strength.

C

Magnetic field strength is same everywhere.

D

None of these

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The correct Answer is:
To solve the question regarding the magnetic field strength observed by Neeraj during his experiment with a bar magnet and iron filings, we can follow these steps: ### Step-by-Step Solution: 1. **Understanding the Experiment**: - Neeraj placed a bar magnet on a sheet of white paper and sprinkled iron filings around it. When he tapped the board, the iron filings arranged themselves in a specific pattern. 2. **Observing the Pattern**: - The arrangement of iron filings indicates the presence of a magnetic field created by the bar magnet. The filings align along the magnetic field lines. 3. **Identifying Magnetic Poles**: - A bar magnet has two poles: a north pole and a south pole. The magnetic field is strongest at the poles and weaker as you move away from them. 4. **Magnetic Field Lines**: - Magnetic field lines are imaginary lines that represent the direction and strength of the magnetic field. The closer the lines are to each other, the stronger the magnetic field in that region. 5. **Analyzing the Statements**: - The question asks which statement about magnetic field strength is correct. - The correct statement is that "the closer the magnetic field lines, the stronger the magnetic field." This is observed at the poles of the magnet where the lines are densely packed. 6. **Eliminating Incorrect Options**: - Any statement suggesting that the magnetic field strength is the same everywhere or that it is weaker where the lines are closer is incorrect. ### Conclusion: The correct statement about magnetic field strength is that "the closer the magnetic field lines, the stronger the magnetic field." This is observed near the poles of the magnet where the iron filings are most densely arranged. ---
To solve the question regarding the magnetic field strength observed by Neeraj during his experiment with a bar magnet and iron filings, we can follow these steps: ### Step-by-Step Solution: 1. **Understanding the Experiment**: - Neeraj placed a bar magnet on a sheet of white paper and sprinkled iron filings around it. When he tapped the board, the iron filings arranged themselves in a specific pattern. 2. **Observing the Pattern**: ...
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