A circular cross-section conductor of radius 1.5 mm carries a current of 5.5 sin (4 × 1010t)μA. What is the amplitude of the displacement current (JD) density if σ (conductivity) is 35 MS/m and εr = 1?

A circular cross-section conductor of radius 1.5 mm carries a current

1.	A circular cross-section conductor of radius 1.5 mm carries a current of 5.5 sin (4 × 1010t)μA. What is the amplitude of the displacement current (JD) density if σ (conductivity) is 35 MS/m and εr = 1?
A.	7.86 × 10-3 μA/m2
B.	-7.86 × 10-3 μA/m2
C.	7.86 μA/m2
D.	78.6 μA/m2
Answer» B. -7.86 × 10-3 μA/m2

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A circular cross-section conductor of radius 1.5 mm carries a current of 5.5 sin (4 × 1010t)μA. What is the amplitude of the displacement current (JD) density if σ (conductivity) is 35 MS/m and εr = 1?

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