GATE EE 2021 Set 1 — Question 15
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Electromagnetic Fields → Time-Varying Fields → Gradient, Divergence & Curl
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Question
Which one of the following vector functions represents a magnetic field ? (, , and are unit vectors along x-axis, y-axis, and z-axis, respectively)
Correct answer
(A) 10xx + 20yy - 30zz
Solution
A valid magnetic field must satisfy the condition (Gauss's Law for Magnetism). Let's check each option:
(A) . This is a valid magnetic field.
(B) .
(C) .
(D) .
(A) . This is a valid magnetic field.
(B) .
(C) .
(D) .
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