Three wires are made of copper havingcircular cross sections. Wire 1 has a lengt
ID: 1736219 • Letter: T
Question
Three wires are made of copper havingcircular cross sections. Wire 1 has a length L and radiusr. Wire 2 has a length L and radius 2r.Wire 3 has a length 2L and radius 3r. Which wirehas the smallest resistance? 1 wire1wire2
wire3
Allthree wires have the same resistance.
Notenough information is given to answer the question. 1 wire1
wire2
wire3
Allthree wires have the same resistance.
Notenough information is given to answer the question. 1 wire1
wire2
wire3
Allthree wires have the same resistance.
Notenough information is given to answer the question. 1
Explanation / Answer
resistance=specific resistance*length/area of cross section so Rl/A wire 3 has smallest resistance. option 3 is correct.
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