Physics · Electric current: drift velocity, mobility and their relation with electric current
Assertion If we bend an insulated conducting wire, the resistance of the wire in
Assertion If we bend an insulated conducting wire, the resistance of the wire increases. Reason The drift velocity of electrons in bent wire decreases.
- A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
- B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
- C. Assertion is correct but Reason is incorrect
- D. Both Assertion and Reason are incorrect
Step-by-step solution
Bending an insulated conducting wire does not change its length or cross-sectional area, so resistance remains the same (ignoring material damage). Drift velocity depends on current density and carrier concentration; for a given current, it also remains unchanged. Therefore, both statements are false.
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