Electromagnetics Field (3140912) MCQs

MCQs of Steady Magnetic Fields

Showing 41 to 43 out of 43 Questions
2 3 4 5
41.
For H = yCos2xāx+(y+ex)āz A/m, the current density at origin is
(a) āx+āy+āz A/m2
(b) āx−āy−āz A/m2
(c) −āx−āy−āz A/m2
(d) −āx+āy+āz A/m2
Answer:

Option (b)

42.
What is the value of current density that can produces a magnetic field of H = 28Sinxāy A/m?
(a) 28Cosxāx A/m2
(b) 28Cosxāy A/m2
(c) 28Cosxāz A/m2
(d) None of above
Answer:

Option (c)

43.
The vector magnetic potential, A due to a direct current in a conductor in free space is given by A = (x2+y2)āz μWb/m2. What will be the magnetic field produced by the current element at (1, 2, 3)?
(a) −3.9āx−4.7āy A/m
(b) 3.9āx−4.7āy A/m
(c) 3.9āx+4.7āy A/m
(d) −3.9āx+4.7āy A/m
Answer:

Option (b)

Showing 41 to 43 out of 43 Questions
2 3 4 5