TS EAMCET · Physics · Current Electricity
Statement (I) : Specific resistance depends on nature of material and independent of temperature of the material. Statement (II) : A wire of resistance \(6 \Omega\) is drawn out so that its new length is four times its original length. The resistance of the new wire is \(48 \Omega\). Statement (III) : Drift velocity is the average constant velocity acquired by free electrons inside a metal by the application of an electric field which results in current. Which of the following is correct?
- A Statements I, II and III are true
- B Statement I is true, but statements II, III is false
- C Statement III is true, but statements I, II are false
- D Statements II, III are true, but statement I is false
Answer & Solution
Correct Answer
(C) Statement III is true, but statements I, II are false
Step-by-step Solution
Detailed explanation
Specific resistance depends both on temperature and nature of material. So (I) is incorrect. When length becomes ' \(n\) ' time, resistance becomes \(n^2\) times. So new resistance will be \(4^2 \times 6=96 \Omega\) So (II) is incorrect. Drift velocity is average velocity with…
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