Assertion (A): A metallic wire carrying an electric current has associ...
- The Assertion is correct. When a metallic wire carries an electric current, it generates a magnetic field around it. This phenomenon is a fundamental aspect of electromagnetism.
- The Reason is also correct. The magnetic field around the wire indeed forms concentric circles, and the direction of these circles is determined by the right-hand rule.
- However, the Reason statement is not the correct explanation of the Assertion. While both statements are individually true, the Reason does not directly explain why a metallic wire carrying an electric current produces a magnetic field.
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Assertion (A): A metallic wire carrying an electric current has associ...
Understanding the Assertion and Reason
The statement provided includes two components: an Assertion (A) about a metallic wire carrying current and a Reason (R) explaining the nature of the magnetic field around it.
Assertion (A):
- A metallic wire carrying an electric current does indeed generate a magnetic field. This phenomenon is a fundamental principle of electromagnetism, confirmed by experimental evidence.
Reason (R):
- The magnetic field lines around the wire are indeed in the form of concentric circles. The direction of these field lines can be determined using the right-hand rule: if you point your thumb in the direction of the current, your fingers curl in the direction of the magnetic field lines.
Why Option B is Correct
- Both the Assertion and the Reason are true statements. However, the Reason does not directly explain the Assertion. The Assertion is a general fact about electric currents and magnetic fields, while the Reason describes a specific characteristic of the magnetic field produced by the current.
- The relationship is that the magnetic field exists due to the current (Assertion), and the right-hand rule helps visualize this magnetic field (Reason). Thus, while the Reason elaborates on the nature of the magnetic field, it does not explain why the magnetic field exists.
Conclusion
- Therefore, the correct answer is option B: both Assertion and Reason are true, but Reason is not the correct explanation of Assertion. This highlights the distinction between a phenomenon and its descriptive characteristics.