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Current Question (ID: 16534)
Question:
$\text{Given below are two statements:}$ $\text{Assertion (A): A metallic shield in the form of a hollow shell may be built to block an electric field.}$ $\text{Reason (R): In a hollow spherical shield, the electric field inside it is zero at every point.}$
Options:
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1. $\text{Both (A) and (R) are True and (R) is the correct explanation of (A).}$
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2. $\text{Both (A) and (R) are True but (R) is not the correct explanation of (A).}$
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3. $\text{(A) is True but (R) is False.}$
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4. $\text{(A) is False but (R) is True.}$
Solution:
$\text{Hint: The electric field inside a conductor (or a cavity within it) is zero.}$ $\text{Explanation: Let's analyze the given statements step-by-step:}$ $\text{Assertion (A): A metallic shield in the form of a hollow shell may be built to block an electric field.}$ $\text{This concept is related to electrostatic shielding, where a conducting hollow shell blocks external electric fields.}$ $\text{The charges in the conductor rearrange themselves on the outer surface, ensuring that the field inside the conductor or its cavity is zero.}$ $\text{This statement is true.}$ $\text{Reason (R): In a hollow spherical shield, the electric field inside it is zero at every point.}$ $\text{This statement is also true. This follows from Gauss’s law, which states that the electric field inside a conductor (or a cavity within it) is zero if no charge is enclosed inside the cavity.}$ $\text{Yes, Reason (R) correctly explains why a metallic shield works: the field inside a conducting hollow shell becomes zero because of the redistribution of charges on the surface of the conductor.}$ $\text{Hence, option (1) is the correct answer.}$
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