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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
- If the velocity of sound in air is 350 m/s, thent he fundamental frequency
- The resistance in the two arms of the meter bridge are 5Ω and RΩ, respectively
- 4 point charges each +q is placed on the circumference of a circle
- Two capacitors of capacitances 2 μF and 3 μF are joined in series.
- An aeroplane flies 400m due to North and then 300m due to south and then flies
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.