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Two copper wires have equal masses
PHYSICS · Single correct · CBSE · Physics · Electricity · Electricity
Problem
Two copper wires have equal masses. The length of wire A is twice the length of wire B. What is the ratio
R
A
:
R
B
R_A : R_B
R
A
:
R
B
of their resistances? (a)
2
:
1
2:1
2
:
1
(b)
1
:
4
1:4
1
:
4
(c)
4
:
1
4:1
4
:
1
(d)
1
:
2
1:2
1
:
2
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