If we increase the cross-section area of a conductor having a length L, the resistance R of that conductor will be:
Correct answer: D. Decreasing
- A. Zero
- B. Constant
- C. Increasing
- D. Decreasing
Explanation
The resistance of a conductor decreases with increase in cross-sectional area. ○If we increase the area of cross section of conductor then More electrons results in more charge crossing the cross section, thus more current. Thus if you increase the area of cross section then resistance of the wire (keeping length and resistivity same) will decrease. Resistance R = ρ L/A Result: From the above discussion and the formula of resistance that with increase in area of cross section resistance decrease and vice versa.
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