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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:
No explanation available. Be the first to write the explanation for this question by commenting below.
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Subject: Physics
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Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Three fourth of the active material decays in a radioactive sample in 3/4 sec
- At what height h above earth, the value of g becomes g/2 (where R=radius of earth)?
- A particle executing SHM with amplitude of 0.1 m. At a certain instant,
- When 4 A current flows for 2 min in an electroplating experiment,
- Two metallic spheres of radii 1 cm and 3 cm are given charges of -1 x 10⁻² C
Topics: Current Electricity (136)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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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.