5. The potential difference across the ends of a wire is doubled in magnitude. I

Question

5. The potential difference across the ends of a wire is doubled in magnitude. If Ohm's law is obeyed, which one of the following statements concerning the resistance of the wire is true? A. The resistance is one half of its original value. B. The resistance is twice its original value. C. The resistance is not changed. D. The resistance increases by a factor of four. E. The resistance decreases by a factor of four.

The answer to this question is C. The resistance is not changed. I don't understand why this is the answer. Why isn't the answer B? The potential difference across the ends of a wire is doubled in magnitude. If Ohm's law is obeyed, which one of the following statements concerning the resistance of the wire is true? 5. The potential difference across the ends of a wire is doubled in magnitude. If Ohm's law is obeyed, which one of the following statements concerning the resistance of the wire is true? A. The resistance is one half of its original value. B. The resistance is twice its original value. C. The resistance is not changed. D. The resistance increases by a factor of four. E. The resistance decreases by a factor of four.

The answer to this question is C. The resistance is not changed. I don't understand why this is the answer. Why isn't the answer B?

Explanation / Answer

C. The resistance is not changed.

It is the same wire. so resistance doesnt change.

Resistance is the property of write , which depends on length,Area of cross section

Here current changes if we cahnge voltage , but not R

Is it clear?

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