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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
- The displacement ‘x’ (in meter) of a particle of mass ‘m’ (in kg) moving in one
- Two point objects of masses 1.5 g and 2.5 g respectively are at a distance of 16 cm
- A parallel beam of fast moving electrons is incident normally on a narrow slit.
- An electric kettle has two heating elements. One brings it to boil in ten minutes
- The root mean square speed of oxygen molecule (O₂) at a certain temperature is v.
Topics: Current Electricity (136)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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