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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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Topics: Current Electricity
(136)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A black body is at 727⁰C. It emits energy at a rate which is proportional to
- The intensity of magnetisation of a bar magnet is 5×10⁴ Am⁻¹. The magnetic length
- The acceleration due to gravity becomes (g/2) where g=acceleration due to gravity
- A train moving at a speed of 220 ms⁻¹ towards a stationary object
- α- particles, β – particles and γ – rays are all having same energy.
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.