Due to which of the following reasons a lightning conductor on top of a building is made into a pointed spike?
A. Dust particles may not accumulate
B. Charge per unit area becomes very high for lightening to discharge
C. Rain drops may not collect
D. None of the above
Answer: Option B
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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