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somehow a q=-2uC charge is placed inside a hollow cavity of conducting non spherical shell which carries no net charge. A Q=4uC charge is placed...

somehow a q=-2uC charge is placed inside a hollow cavity of conducting non spherical shell which carries no net charge. A Q=4uC charge is placed outside the shell 3m from the -2uC charge. The net electric charge on the outer surface of the conductor is
-4uC
-2uC
4uC
2uC
0uc

The angle of incidence in degrees in sunlight 100% when reflecting form a glass surface having index of refraction is
0def
53deg
56.3deg
45deg

#3 A spherical convex mirror has a radius of curvature of magnitude of 20cm. At what distance from the mirror should an objectbe placed to obtain an image that is virtual,four times smaller and upright

30cm
20 cn
15cm
10cm

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