A conductor slab of dimensions
3cm x 4cm x 6cm has a resistivity
p=3 x 10-2 Nm . Find the resistance
along the length 4cm.
Answers
Answered by
0
Answer:
9:1
Step-by-step explanation:
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Answered by
1
Answer:
Given that,
The dimension of the block is 1cm, 3cm and 3cm.
The relation of the resistance of a conductor is
R=ρ
A
l
....(I)
Where,
ρ = resistivity of the material of the conductor
A= area of the cross section of the conductor
l= length of the conductor
Now, the resistance is maximum
R
max
=ρ×
1×2
3
R
max
=
2
3ρ
...(II)
Now, the resistance is minimum
R
min
=ρ
2×3
1
R
min
=
6
ρ
...(III)
Now, from equation (II) and (III)
The ratio of maximum resistance and minimum resistance is
R
min
R
max
=
6
ρ
2
ρ3
R
min
R
max
=
2
3
×
1
6
R
min
R
max
=
1
9
R
max
:R
min
=9:1
Hence, the ratio is 9:1
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