Which one of the following is the correct expression for torque on a loop in magnetic field $$\overrightarrow B $$? (here $$\overrightarrow M $$ is the loop moment).
A. $$\overrightarrow T = \nabla .\overrightarrow B $$
B. $$\overrightarrow T = \overrightarrow M .\overrightarrow B $$
C. $$\overrightarrow T = \overrightarrow M \times \overrightarrow B $$
D. $$\overrightarrow T = \overrightarrow B \times \overrightarrow M $$
Answer: Option C
This Question Belongs to Electronics And Communications Engineering >> 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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