Given potential V = 2x2y + z2, then the electric field at (1, 1, 0) is
A. $$ - 4{{\hat a}_x} - 2{{\hat a}_y}$$
B. $$4{{\hat a}_x} + 2{{\hat a}_y}$$
C. $$ - 2{{\hat a}_x} - 4{{\hat a}_y}$$
D. $$2{{\hat a}_x} + 4{{\hat a}_y}$$
Answer: Option A
A. $$ - 4{{\hat a}_x} - 2{{\hat a}_y}$$
B. $$4{{\hat a}_x} + 2{{\hat a}_y}$$
C. $$ - 2{{\hat a}_x} - 4{{\hat a}_y}$$
D. $$2{{\hat a}_x} + 4{{\hat a}_y}$$
Answer: Option A
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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