current-electricity Question 5
Question: Q. 2. Define temperature coefficient of resistivity.
R [SQP 2018-19]
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Solution:
Ans. Fractional change in resistivity per unit change in temperature.
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AI Q. 3. Nichrome and copper wires of same length and same radius are connected in series. Current
Ans. (i) Nichrome
(ii) $\mathrm{R}{N i}>\mathrm{R}{\mathrm{Cu}}
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Detailed Answer :
Two wires having similar length and radius, Nichrome wire gets heated up more as compared to copper wire since resistivity of Nichrome is more than that of Copper.
[AI Q. 4. Plot a graph showing the variation of current
Ans.
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