What is the potential difference across the ...

ICSE Class 10 Physics 2015 Paper

A cell of Emf $2\ \mathrm{V}$ and internal resistance $1.2\ \Omega$ is connected with an ammeter of resistance $0.8\ \Omega$ and two resistors of $4.5\ \Omega$ and $9\ \Omega$ as shown in the diagram below :

Question : 60 of 74

Marks: +1, -0

What is the potential difference across the terminals of the cell?

Solution:

\;\;\text{ Terminal Voltage (V) }\;

= E - I r = 2 - 0.4 \times 1.2

\;=2-0.48

\;=1.52 \;\text{ volt. }

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