The resistance of a wire of length 300m and cross-section area 1.0mm2 made of material of resistivity 1.0×10−7Ωm is:
2Ω
3Ω
20Ω
30Ω
A
3Ω
B
20Ω
C
30Ω
D
2Ω
Open in App
Solution
Verified by Toppr
Was this answer helpful?
72
Similar Questions
Q1
The resistance of a wire of length 300 m and cross-section area 1.0 mm2 made of material of resistivity 1.0 × 10−7 Ωm is:
(a) 2 Ω
(b) 3 Ω
(c) 20 Ω
(d) 30 Ω
View Solution
Q2
A wire of given material of length l and area of cross section A, has a resistance of 2Ω.Find the resistance of another wire of the same material having length 2l and area of cross-section A/2.
View Solution
Q3
Calculate the area of cross-section of a wire if its length is 1.0 m, its resistance is 23 Ω and the resistivity of the material of the wire is 1.84 × 10−6 Ω m.
View Solution
Q4
What is the lengh of a wire having resistance of 20Ω,cross sectional area 4×10−4m2 and resistivity 5×10−4Ωm.