Electromagnetic Field Theory In an iron core coil the iron core is removed so that the coil becomes an air core coil. The inductance of the coil will decrease. remain the same. increase. initially increase and then decrease. decrease. remain the same. increase. initially increase and then decrease. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory A magnetic vector potential is given by the expression A = (- cos x) (cos y) uz. The flux density at the origin is – uy. 2 ux. 0. – 2 ux. – uy. 2 ux. 0. – 2 ux. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory The magnitude of the induced emf in a conductor depends upon on the rate of change of flux linkage. amount of flux cut. flux density of the magnetic field. amount of flux linkage. rate of change of flux linkage. amount of flux cut. flux density of the magnetic field. amount of flux linkage. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory Which of the following will increase the antenna radiation efficiency? Top loading of antenna Providing insulation on conductor Use of larger section of conductor Any of the above Top loading of antenna Providing insulation on conductor Use of larger section of conductor Any of the above ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory Which of following circuit element stores energy in electro-magnetic field? Capacitor. Variable Resistor. Condenser. Inductor. Capacitor. Variable Resistor. Condenser. Inductor. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory Gradient of scalar field is expressed as Gradient of divergence of a vector field minus the curl of the vector field. Maximum rate of increase of scalar function at a point. Outward flux of a vector field per unit volume as the volume about the point tends to zero. Circulation of a vector field per unit area as the area tends to zero. Gradient of divergence of a vector field minus the curl of the vector field. Maximum rate of increase of scalar function at a point. Outward flux of a vector field per unit volume as the volume about the point tends to zero. Circulation of a vector field per unit area as the area tends to zero. ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS