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The resultant electric field of a wave with Ex = 3 and Ey = 4 will be(a) 7(b) 1(c) 25(d) 5This question was addressed to me in a national level competition.My doubt is from S and P Polarised Waves topic in division EM Wave Propagation of Electromagnetic Theory

Answer»

The correct OPTION is (d) 5

For EXPLANATION: The resultant electric field of two electric COMPONENTS Ex and Ey is E = √(Ex^2 + Ey^2). On substituting for Ex = 3 and Ey = 4, we GET E = 5 units.



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