Electromagnetic Field Theory Ohm’s law in point from field theory can be expressed as J = σE. J = E / σ. R = ρ × ( l / A). V = IR. J = σE. J = E / σ. R = ρ × ( l / A). V = IR. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory A circular loop has its radius increasing at a rate of 2 m/s. The loop placed perpendicular to a constant magnetic field of 0.5 wb/m2. When the radius of the loop is 4 m. the emf induced in the will be 0.8 π V. 0.4 π V. 8 π V. Zero. 0.8 π V. 0.4 π V. 8 π V. Zero. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory A plane wave magnetic field is represented by Bx = cos(y – ct). The electric and magnetic fields will be zero in the direction Ex = Ey = 0, By = Bz = 0. None of these. Ey = Ez = 0, By = Bz = 0. Ex = Ey = 0, Bx = By = 0. Ex = Ey = 0, By = Bz = 0. None of these. Ey = Ez = 0, By = Bz = 0. Ex = Ey = 0, Bx = By = 0. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory The electrical field strength at a distance point A due to a point charge +q, located at the origin, is 100 µl v/m. If the point charge is now enclosed by a perfectly conducting metal sheet sphere whose centre is at origin, A, outside the sphere, becomes None of above. 100 μ v/m. 0. - 100 μ v/m. None of above. 100 μ v/m. 0. - 100 μ v/m. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory The coils having self inductance of 10 mH and 15 mH have an effective inductance of 40 mH, when connected in series aiding. What will be the equivalent inductance if we connect then in series opposing? 10 mH. 5 mH. 20 mH. 0 mH. 10 mH. 5 mH. 20 mH. 0 mH. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory The heating time constant of an electrical machine gives an indication of its overload capacity. short time rating. cooling. rating. overload capacity. short time rating. cooling. rating. ANSWER DOWNLOAD EXAMIANS APP
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