Assertion :It is established that an electric current through a metallic conductor produces a magnetic field around it. There is a similar magnetic field produced around a thin beam of moving alpha particles. Reason: Alpha particles being positively charged constitutes a current in the direction of motion.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
An electrical phenomenon is caused by flow of free electrons from one atom to another. Electrons which continuously move in a conducting medium are called electric current.
Alpha particles are attracted to the negatively charged point which proves that they must be positively charged as unlike charges attract. Alpha particles are helium nuclei with 2 protons which gives them their positive charge.
Therefore, when current flows through moving beam of alpha particles, there is movement of charges which creates a magnetic field around it.

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