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 Charge per unit area becomes very high for lightening to discharge Dust particles may not accumulate None of these Rain drops may not collect Charge per unit area becomes very high for lightening to discharge Dust particles may not accumulate None of these ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory The core of coil length is 200 mm. The inductance of coil is 6 mH. If the core length is doubled, all other quantities, remaining the same, the inductance will be 24 mH. 48 mH. 12 mH. 3 mH. 24 mH. 48 mH. 12 mH. 3 mH. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory An electric field on a place described by its potential V = 20 (r -1 + r-2) where r is the distance from the source. The field is due to A quardra pole. Both of A and B. A monopole. A dipole. A quardra pole. Both of A and B. A monopole. A dipole. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory The inductance of a long solenoid of length 1000 mm wound uniformly with 3000 turns on a cylindrical paper cable of 60 mm diameter is 32 mH. 3.2 µH. 3.2 H. 3.2 mH. 32 mH. 3.2 µH. 3.2 H. 3.2 mH. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory When the phase velocity of an EM wave depends on frequency in any medium the phenomenon is called Scattering Dispersion Polarisation Absorption Scattering Dispersion Polarisation Absorption ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory Conductor is varying and field is fixed then emf will be induced. This principle is called static induced emf. None of these both A and B. dynamically induced emf. static induced emf. None of these both A and B. dynamically induced emf. ANSWER DOWNLOAD EXAMIANS APP
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