Two wires of same metal have the same length but their cross-sections are in the ratio 
. They are joined in series. The resistance of the thicker wire is 
. The total resistance of the combination will be
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
A
For same material and same length
⇒ ⇒ 
Resistance of thick wire 
∴ ∴ Resistance of thin wire 
Total resistance in series = 10 + 30 = 40 Ω Ω
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