2. The potential difference across the ends of a resistive wire is doubled in ma

Question

2. The potential difference across the ends of a resistive wire is doubled in magnitude (the properties of the wire are otherwise constant). 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, instead the current changes. D) The resistance increases by a factor of four. E) The resistance decreases by a factor of four.

Explanation / Answer

According to ohms law potential difference acoss resistor is directly proportional to current. So if potential difference doubles current doubles but the resistance remains unchanged.

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