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Which is true? A real emf device has internal resistance and an ideal emf device does not. An ideal emf device has internal resistance and a real emf device does not. A real emf device sets up a potential difference and an ideal emf device does not. An ideal emf device sets up a potential difference and a real emf device does not.

Which is true? A real emf device has internal resistance and an ideal emf device does not. An ideal emf device has internal resistance and a real emf device does not. A real emf device sets up a potential difference and an ideal emf device does not. An ideal emf device sets up a potential difference and a real emf device does not.

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Which is true? A real emf device has internal resistance and an ideal emf device does not. An ideal emf device has internal resistance and a real emf device does not. A real emf device sets up a potential difference and an ideal emf device does not. An ideal emf device sets up a potential difference and a real emf device does not.

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