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A student measures the terminal potential difference (V) of a cell (of emf E and internal resistance r) as a function of the current (I) flowing through it. The slope and intercept, of the graph between V and I, then, respectively, equal:
Options
(a) – r and E
(b) r and – E
(c) – E and r
(d) E and -r
Correct Answer:
– r and E
Explanation:
The terminal potential difference of ao ocell is given by V + Ir = E V = Vₘ – Vₙ
or V= E – Ir
dV/ dI = – r, Also for i= 0 then V = E
slope = – r, intercept = E
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Topics: Current Electricity
(136)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Two sound waves of wavelengths 5m and 6m formed 30 beats in 3 seconds
- The kirchoff’s first law (∑i=0) and second law (∑iR=∑E), where the symbols
- A light whose frequency is equal to 6.0 x 10¹⁴ Hz is incident on a metal
- A p-n photodiode is fabricated from a semiconductor with a band gap of 2.5 eV.
- When the angle of incidence is 60° on the surface of a glass slab, it is found
Topics: Current Electricity (136)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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