Electromagnetic Field Theory A metal surface with 1 meter radius and surface charge density of 20 coulombs / m2 is enclosed in a 10 m side cube. The total outward electric displacement normal to the surface of the cube is 40π coulombs. 10π coulombs. 80π coulombs. none of these. 40π coulombs. 10π coulombs. 80π coulombs. none of these. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory Due to which of the following reasons a lightning conductor on top of a building is made into a pointed spike? Rain drops may not collect Dust particles may not accumulate Charge per unit area becomes very high for lightening to discharge None of these Rain drops may not collect Dust particles may not accumulate Charge per unit area becomes very high for lightening to discharge None of these ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory Which of following is the unit of inductance? Ohm. Webers / m. Milli- henry. Ampere turns. Ohm. Webers / m. Milli- henry. Ampere turns. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory The critical frequency of ‘F’ layer is greater than 30 MHz. False True False True ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory Materials subjected to rapid reversals of magnetism should have both a and b. low permeability. high permeability. low hysteresis loss. both a and b. low permeability. high permeability. low hysteresis loss. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory The field at any point on the axis of a current carrying coil will be parallel to axis. at angle of 45° with the axis. perpendicular to the axis. zero. parallel to axis. at angle of 45° with the axis. perpendicular to the axis. zero. ANSWER DOWNLOAD EXAMIANS APP
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