Physics
Grade-9
Easy
Question
Which offers more resistance?
- A
- B
- Both A and B
- Cannot say
Hint:
Resistance is inversely proportional to the diameter of the wire.
The correct answer is: B
Resistance depends on the diameter of the wire.
It can be proven from the,
R = ρ 
From this, we can conclude that,
R 
R 
Thus, when the radius of the wire decreases, resistance will increases.
Hence, wire B has more resistance.
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