If the resistance doubles while the current remains constant, what happens to the emf E?

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Multiple Choice

If the resistance doubles while the current remains constant, what happens to the emf E?

Explanation:
Ohm's law relates emf, current, and resistance through E = I R. If the current is held fixed, the emf scales directly with resistance. So when resistance doubles, the emf must also double to keep the same current. The other possibilities would violate E = I R under the given condition. Additionally, with the current unchanged, the power delivered (P = E I) would increase correspondingly as the emf increases.

Ohm's law relates emf, current, and resistance through E = I R. If the current is held fixed, the emf scales directly with resistance. So when resistance doubles, the emf must also double to keep the same current. The other possibilities would violate E = I R under the given condition. Additionally, with the current unchanged, the power delivered (P = E I) would increase correspondingly as the emf increases.

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