Physics
Find the resistance (in mega) of a wire of length 20m, cross sectional area 1 cm2 and made of a material of resistivity 200m.

80
40
2000
4000

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Physics
Energy in reflected light :

Decreases with the increase in angle of incidence
Increases with the increase in angle
Becomes maximum for angle of incidence equal to 45°
Does not depends on the angle of incidence

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