An electron in potentiometer experiences a force 2.4×10⁻¹⁹N. The length of potentiometer

An electron in potentiometer experiences a force 2.4×10⁻¹⁹N. The length of potentiometer wire is 6m. The emf of the battery connected across the wire is (electronic charge=1.6×10⁻¹⁹C)

Options

(a) 6V
(b) 9V
(c) 12V
(d) 15V

Correct Answer:

9V

Explanation:

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  • Formula Used: EMF = Force*distance/charge , given in HC Verma (Electric Current in conductors)
    Plugging all the values give the value of EMF to be 9V.

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