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Which pair of quantities is not proportional ? (A) angle of incidence and angle of refraction for light entering a glass block (B) current and potential difference for a resistor at constant temperature (C) extension and load applied for a wire which obeys Hooke`s law (D) speed and time for an object freely falling from rest through a vacuum

Which pair of quantities is not proportional ?


 


(A) angle of incidence and angle of refraction for light entering a glass block


(B) current and potential difference for a resistor at constant temperature


(C) extension and load applied for a wire which obeys Hooke`s law


(D) speed and time for an object freely falling from rest through a vacuum

Grade:10

2 Answers

Ashish Kumar
askIITians Faculty 32 Points
7 years ago
The answer is (A). The angle of incidence and refraction obey the Snells law and related by
sin i / sinr = u. So they have a sine relation which is not directly proportional.




169-1345_signature1.GIF
Vignesh R
24 Points
7 years ago
a

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