Electromagnetic Field Theory - Study Mode

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[#206] The region between two concentric cylinder with radii of 2 and 5 cm contains a volume charge distribution of -10 -8 (1 + 10r) C/m 3 . If E r and V both are zero at the inner cylinder and ε = ε 0 , the potential V at the outer cylinder will be:

(A) 0.506 V

(B) 5.06 V

(C) 50.6 V

(D) 506 V

Correct Answer

(A) 0.506 V

[#207] Find the gradient of the curve y = 3x 2 -7x + 2 at the point (1, -2):

(A) 1

(B) -2

(C) 2

(D) -1

Correct Answer

(D) -1

[#208] The characteristic impedance of a transmission line with inductance 0.294 µH/m and capacitance 60 pF/m, is

(A) 49 Ω

(B) 60 Ω

(C) 70 Ω

(D) 140 Ω

Correct Answer

(C) 70 Ω

[#209] In a charge-free space, the Poisson's equation results in which of the following?

(A) Continuity equation

(B) Maxwell's equation

(C) Laplace equation

(D) None of the above

Correct Answer

(C) Laplace equation

[#210] A TEM wave is incident normally upon a perfect conductor. The E and H fields at the boundary will be, respectively,

(A) minimum and minimum

(B) maximum and maximum

(C) minimum and maximum

(D) maximum and minimum

Correct Answer

(C) minimum and maximum