Electromagnetic-theory Questions Set 42:
What is the expression for Maxwell's equation in free space?
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In perfect conductors, the phase shift between the electric field and magnetic field is
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Consider a conducting sphere of radius R that has a charge Q. Within what radius is 25% of its energy stored?
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A direct on-line starter is used for starting motors up to what horsepower?
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Divergence of gradient of a vector function is equivalent to
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A wire of diameter 1 mm and conductivity of 5 × 10^7 S/m has 10^29 free electrons/m^3 when an electric field of 10 mV/m is applied. Determine the current density.
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A parallel plate capacitor has a charge of 10-6 C on each plate and a potential difference of 2000 V between the plates. What is the value of the capacitance (in F)?
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A rectangular hollow metal waveguide has dimensions a = 2.29 cm and b = 1.02 cm. Microwave power at 10 GHz is transmitted through the waveguide in the TE10 mode. What is the cut-off wavelength for this mode?
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The characteristics equations of a Hybrid coupler are:
α = real power coming out of collinear port
β = imaginary power
θ = E-plane angle
φ = H-plane angle
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In a manual shunt motor starter, the overload relay and no-volt relay are connected in which way?
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