Question

The cross product of the vectors 3i + 4j – 5k and –i + j – 2k is, (a) 3i – 11j + 7k (b) -3i + 11j + 7k (c) -3i – 11j – 7k (d) -3i + 11j – 7k This question was posed to me by my college professor while I was bunking the class. This question is from Dot and Cross Product in portion Vector Analysis and Applications of Electromagnetic Theory Select the correct answer from above options Electromagnetic Theory questions and answers, Electromagnetic Theory questions pdf, Electromagnetic Theory question bank, Electromagnetic Theory questions and answers pdf, mcq on Electromagnetic Theory pdf,electromagnetic theory book pdf,electromagnetic theory pdf notes,electromagnetic theory lecture notes,electromagnetic theory of light,maxwell electromagnetic theory,electromagnetic theory proposed by,electromagnetic theory engineering physics,electromagnetic theory nptel

Answer 1

Correct option is (b) -3i + 11j + 7k Easiest explanation: Cross product of two vectors is, A X B = (a2*b3 – b2*a3)i – (a1*b3 – b1*a3)j + (a1*b2 – b1*a2)k. Using the formula, the answer can be calculated.