When cooled below \(4.2\) K, mercury becomes a superconductor, which means it has no electrical resistance. When a current is passed through mercury under these conditions, which one of the following effects will be present?
(a) thermal
(b) chemical
(c) magnetic
Choose the correct option from the given ones:
1. | (a) and (c) only |
2. | (a), (b) and (c) |
3. | (b) only |
4. | (c) only |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biologyi. | \(A\) is feebly repelled. | ii. | \(B\) is feebly attracted. |
iii. | \(C\) is strongly attracted. | iv. | \(D\) remains unaffected. |
1. | \(C\) is of a diamagnetic material. |
2. | \(D\) is of a ferromagnetic material. |
3. | \(A\) is of a non-magnetic material. |
4. | \(B\) is of a paramagnetic material. |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologySoft iron is used to manufacture electromagnets because:
1. It has a high permeability.
2. Its retentivity and coercivity are small.
3. Its retentivity and coercivity are high.
4. Both (1) & (2)
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology1. | low hysteresis loss | 2. | high hysteresis loss |
3. | high permeability | 4. | both (1) and (3) |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyPrefer Books for Question Practice? Get NEETprep's Unique MCQ Books with Online Audio/Video/Text Solutions via Telegram Bot
NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology