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  4. The variation of terminal potential difference (V) with current flowing through as cell is as shown. The emf and internal resistance of the cell are

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Q. The variation of terminal potential difference (V) with current flowing through as cell is as shown. The emf and internal resistance of the cell arePhysics Question Image

KCETKCET 2019Current Electricity

Solution:

$V=E-lr$
This is the form of : y = mx + c
When I = 0, V = E = 3v $\quad When\, V = 0, r=\frac{E}{I}=\frac{3}{6}=0.5 \Omega$