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 12 mH. 3 mH. 48 mH. 24 mH. 12 mH. 3 mH. 48 mH. 24 mH. 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? Charge per unit area becomes very high for lightening to discharge None of these Dust particles may not accumulate Rain drops may not collect Charge per unit area becomes very high for lightening to discharge None of these Dust particles may not accumulate Rain drops may not collect ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory The magnitude of force acting on a current carrying conductor placed in a magnetic field is independent of current flowing through the conductor. cross-sectional area of conductor. flux density. length of conductor. current flowing through the conductor. cross-sectional area of conductor. flux density. length of conductor. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory An electric dipole of moment P is placed in front of a ground sphere. The change induced on the surface of the sphere is (Assume radius of sphere = R and distance from dipole to centre of sphere = d) Zero. PR/d. PR 2/d3. PR/d2. Zero. PR/d. PR 2/d3. PR/d2. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory A magnetic material has a total flux B of 80 micro Wb with an mmf of 160 AT. The reluctance in ampere turn per weber is 2 × 108. 2 × 106. 2 × 10-8. 2 × 10-6. 2 × 108. 2 × 106. 2 × 10-8. 2 × 10-6. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory Two coupled coils with L1 = L2 = 0.6 H have a coupling coefficient of K = 0.8. The turns ratio N1/N2 is 4. 2. 1. 0.5. 4. 2. 1. 0.5. ANSWER DOWNLOAD EXAMIANS APP
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