the current drawn from the cell when the key ...

ICSE Class 10 Physics 2019 Paper

The diagram above shows a circuit with the key $k$ open. Calculate :

Question : 60 of 74

Marks: +1, -0

the current drawn from the cell when the key

k

is open.

Solution:

When the key

{K}

is open,

I\;=\;\frac{E}{R+r}\;=\;\frac{3.3}{5+0.5}

\;=\;\frac{3.3}{5.5}\;=\;\frac{3}{5}=0.6\,\mathrm{A}

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