Fermi
·
Concept Library
·
Courses
·
Books
·
Problems
·
Simulations
·
Math Wiki
·
High School
Fermi
›
Problems
Two wires P and Q are made of the same material
PHYSICS · Single correct · CBSE · Physics · Electricity · Electricity
Problem
Two wires P and Q are made of the same material. Wire P has length
L
L
L
and diameter
2
d
2d
2
d
, while wire Q has length
2
L
2L
2
L
and diameter
d
d
d
. What is the ratio
R
P
:
R
Q
R_P : R_Q
R
P
:
R
Q
of their resistances? (a)
4
:
1
4:1
4
:
1
(b)
1
:
8
1:8
1
:
8
(c)
1
:
4
1:4
1
:
4
(d)
8
:
1
8:1
8
:
1
Related theory
Resistance & Resistivity
Electric Circuits
Electricity
Resistivity and factors affecting resistance
Resistance: geometry and temperature dependence
Current Electricity
Factors affecting resistance of a conductor
Browse the problem library