Electromagnetic Field Theory A point pole has a strength of 4π × 10-4 weber. The force in newtons on a point pole of 4π × 1.5 × 10-4 weber placed at a distance of 10 cm from it will be 7.5 N. 3.75 N. 20 N. 15 N. 7.5 N. 3.75 N. 20 N. 15 N. 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 450. 150. 300. 600. 450. 150. 300. 600. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory The useful magnetic flux obtainable from any closed surface is Both A and B Constant None of these Unity Both A and B Constant None of these Unity ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory In case of surface waves the field strength at a point is directly proportional to Wave frequency Antenna height Current of the antenna Distance of the point from the antenna Wave frequency Antenna height Current of the antenna Distance of the point from the antenna ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory When a wave is incident from the more dense into a less dense medium at an angle equal to or exceeding the critical angle, the wave suffers total internal __________ . None of these Refraction Transmission Reflection None of these Refraction Transmission Reflection ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory A sphere of radius with a uniform charge density ρv C/m3 shall have electric flux density at radius “r = a” equal to aρv/4 C/m2. aρv C/m2. aρv/3 C/m2. ρv/3 C/m2. aρv/4 C/m2. aρv C/m2. aρv/3 C/m2. ρv/3 C/m2. ANSWER DOWNLOAD EXAMIANS APP
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