when a current of (5±0.5)A flows through a wire, it develops a potential difference of (40±1)V The resistance of the wire is ........
a (8±1.5 )Ω
b (8±0.5 )Ω
c (8±1 )Ω
d (8±2 )Ω
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Answer:
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Explanation:
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Concept Introduction:
Ohm's law: The strength of a direct current is directly proportional to the potential difference and inversely proportional to the resistance of the circuit.
Given: current of (±)A and potential difference of (±)V
To Find:
We have to find the value of, resistance of wire.
Solution:
According to the problem,
According to Ohm's Law
⇒
⇒Ω
And we know error gets added so
∴Resistance of the wire is (8±1.5 )Ω.
Final Answer:
The value of resistance of the wire is (8±1.5 )Ω.
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