The potential difference across a copper wire is 2.0 V when a current of 0.4 A flows through it. The resistance of the wire is?
A5.0 Ω
B0.5 Ω
C0.2 Ω
D2.5 Ω
A5.0 Ω
B0.5 Ω
C0.2 Ω
D2.5 Ω
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Which of the following method(s) can be used to change the direction of force on a current carrying conductor?