Electromagnetic Field Theory Ohm’s law in point from field theory can be expressed as R = ρ × ( l / A). J = E / σ. J = σE. V = IR. R = ρ × ( l / A). J = E / σ. J = σE. V = IR. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory Magnetic field intensity at centre of circular coil, of diameter 1 m and carrying a current of 2 A is 4 A/m. 8 A/m. 2 A/m. 1 A/m. 4 A/m. 8 A/m. 2 A/m. 1 A/m. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory A waveguide operated below cut off frequency can be used as None Phase shifter An attenuator An isolator None Phase shifter An attenuator An isolator ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory The magnetic field required to reduce the residual magnetism to zero is called Saturation magnetism. Retentivity. Hysteresis. Coercivity. Saturation magnetism. Retentivity. Hysteresis. Coercivity. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory An insulated metal sphere of 20 cm diameter is charged by rubbing with charges 2 × 10-8 C. Potential developed will be 1800 V. 200 V. 0 V. 900 V. 1800 V. 200 V. 0 V. 900 V. 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 length of conductor. cross-sectional area of conductor. flux density. current flowing through the conductor. length of conductor. cross-sectional area of conductor. flux density. current flowing through the conductor. ANSWER DOWNLOAD EXAMIANS APP
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