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Types of Lamps

Question 13 T...

Question

Question 13
The resistivity does not change if

(a) the material is changed
(b) the temperature is changed
(c) the shape of the resistor is changed
(d) both material and temperature are changed

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Solution

(c) the shape of the resistor is changed

Resistivity depends on the nature of the material and on the temperature. It does not depend on the shape. It is constant for a particular material at a given temperature.

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