Electromagnetic Field Theory The principle of dynamically induced emf is utilized in a thermocouple. transformer. choke. generator. thermocouple. transformer. choke. generator. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory A metal sphere with 1 m radius and a surface charge density of 10 coulombs/m2 is enclosed in a cube of 10 m side. The total outward electric displacement normal to the surface of the cube is None of above. 10 C. 40π C. 5 C. None of above. 10 C. 40π C. 5 C. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory The magnetic field required to reduce the residual magnetism to zero is called Hysteresis. Coercivity. Saturation magnetism. Retentivity. Hysteresis. Coercivity. Saturation magnetism. Retentivity. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory Magnetic circuit with cross sectional area of 20 cm2 is to be operated at 50 Hz from 120 Vrms supply. The number of turns required to active a peak magnetic flux density of 1.8 T in the core flux is 600. 450. 300. 150. 600. 450. 300. 150. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory A rectangular waveguide is a Rectangular conducting wire to propagate electromagnetic waves Hollow rectangular conducting tube through which electromagnetic waves can be propagat-ed Tube antenna to transmit and receive electromagnetic waves Hollow rectangular walled room carrying electromagnetic wave Rectangular conducting wire to propagate electromagnetic waves Hollow rectangular conducting tube through which electromagnetic waves can be propagat-ed Tube antenna to transmit and receive electromagnetic waves Hollow rectangular walled room carrying electromagnetic wave 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. abω Bo sinω t. Bo ω sinω t. ab Bo cosω t. Zero. abω Bo sinω t. Bo ω sinω t. ab Bo cosω t. ANSWER DOWNLOAD EXAMIANS APP
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