Electric displacement current density D at any point on a spherical surface of radius r centred at the isolated charge q is:
A. $$\frac{{{q^2}}}{{{r^2}}}$$
B. $$\frac{q}{{{r^2}}}$$
C. $$\frac{q}{{4\pi {r^2}}}$$
D. $$\frac{q}{{4{\pi ^2}{r^2}}}$$
Answer: Option C
Related Questions on Electromagnetic Field Theory
A loop antenna is a commonly used for
A. Radar
B. Direction finding
C. Satellite communication
D. All of the above
The divergence of a vector is a scalar, while the curl of a vector is another
A. Scalar
B. Vector
C. Unit vector
D. None of the above
Which antenna is a wideband antenna?
A. Hertz antenna
B. Marconi antenna
C. Folded dipole
D. None of the above
A. Accelerating
B. Retardation
C. Oscillating
D. Lagging the current

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