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Materials that carry current when a field is applied are:
AVacuum gap
BConductors
CInsulators
DDielectric
Answer & Solution
Correct answer: B. Conductors
1. Some materials have charges free to move.
2. An applied field sets those charges moving.
3. Such materials are called conductors.
4. So the answer is conductors.
_Source: NCERT Class 12 Physics, Ch 3 'Current Electricity'_
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