1.

In the concave reflector of a torch, the bulb is placed : (a) between the pole and focus of reflector (b) at the focus of reflector (c) between focus and centre of curvature of reflector (d) at the centre of curvature of reflector

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In the concave reflector of a torch, the bulb is placed : (a) between the pole and focus of reflector (b) at the focus of reflector (c) between focus and centre of curvature of reflector (d) at the centre of curvature of reflector



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