Electromagnetic Field Theory Which of the following is multiband HF receiving antenna? Log-periodic Folded dipole Square loop Conical horn Log-periodic Folded dipole Square loop Conical horn ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory A rectangular loop in the x – z plane bounded by the lines x = 0, x = a, z = 0 and z = b is in a time varying magnetic field is given by B = B0 cosωt + ay. Where B0 is constant, ω is angular frequency and ay unit vector in the y direction. Now the emf induced in the loop is given by Zero. Bo ω sinω t. ab Bo cosω t. abω Bo sinω t. Zero. Bo ω sinω t. ab Bo cosω t. abω Bo sinω t. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory The frequency of the power wave associated with an electromagnetic wave having field as E = e-z/δ cos(ω - zδ) is given by ω. ω/2π. ω/4π. ω / π. ω. ω/2π. ω/4π. ω / π. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory How much current must flow in a loop of radius 1m to produce a magnetic field of 1 mA/m? 1mA. 2.5 mA. 2 mA. 1.5 mA. 1mA. 2.5 mA. 2 mA. 1.5 mA. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory The tubes of force within the magnetic material are known as magnetic flux. tubes of indication. lines of force. none of them. magnetic flux. tubes of indication. lines of force. none of them. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory What is the value of magnetic vector potential due to an infinitesimally small current element, evaluated at infinite distance from it? Unity. Depends on strength of current element. Zero. Infinity. Unity. Depends on strength of current element. Zero. Infinity. ANSWER DOWNLOAD EXAMIANS APP
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