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Electromagnetic Field Theory

Electromagnetic Field Theory
Which of the following is zero in relation to electromagnetic fields?

 Curl curl A.
 Div curl A.
 Div grad V.
 Grad div A.

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Electromagnetic Field Theory
Cork Screw rule is used to find

 direction of electric field.
 direction of current.
 direction of magnetic field.
 direction of emf.

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Electromagnetic Field Theory
The minimum height of outer atmosphere is

200 km
400 km
150 km
100 km

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Electromagnetic Field Theory
The electric flux is given D = (2y2 + z) Ix + 4xy Iy + x Iz C/m2. The volume charge density at point (-1, 0, 3) is

 - 4 C/m3.
 - 8 C/m3.
 - 2 C/m3.
 0 C/m3.

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Electromagnetic Field Theory
1 Maxwell is the same as

 104 weber.
 10-4 weber.
 10-8 weber.
 10-8 weber.

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Electromagnetic Field Theory
What is the value of skin depth as 100 Hz in a material having μr = 1.0 and & σ = 3.60 × 107 s/m

 4 mm.
 8.4 mm.
 2.4 mm.
 10 mm.

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