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JAMB Physics 2018 Paper

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Question : 48

Total: 87

An object is placed 20cm from a concave mirror of focal length 10cm. The linear magnification of the image produced is?

0
$\frac{1}{2}$
1
2

Solution:

$\frac{I}{V}$ = $\frac{1}{f}$ – $\frac{1}{u}$

$\frac{I}{V}$ = $\frac{1}{10}$ – $\frac{1}{20}$

= $\frac{1}{20}$ V

V = 20cm.

M = $\frac{V}{U}$

= $\frac{20}{20}$

= 1

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