Physics: For the following ray diagram, …

Physics: For the following ray diagram, which of the pair of angles are incorrectly marked: [a] ∠A & ∠i [c] ∠e & ∠i 2) Rainbow is caused by : [a] Scattering [c] Atmospheric refraction [b] ∠A & ∠D [d] ∠r & ∠i [b] Dispersion [d] None of the above 3) A student carries out an experiment and plot the V-I graph of three samples of nicrome wire with resistance R1, R2& R3 respectively as shown below. Which of the following is true : [a] R1 =R2 = R3 [c] R3>R2>R1 [b] R1>R2>R3 [d] R2>R3>R1 4) A light ray enters from medium A to medium B as shown, the refractive index of medium B relative to A will be : [a] greater than unity [c]equal to unity [b] less than unity [d]zero 5) Choose the correct expression for lenses : [a] M =(hi/ho)=(-V/U) [b] M =(hi/ho)=(V/U)

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