Electromagnetic Field Theory Whenever the magnetic flux changes with respect to an electric conductor or a coil, an EMF is induced in the conductor is Faraday’s third law fourth law second law first law third law fourth law second law first law ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory Two coils are coupled in such a way that the mutual inductance between them is 20 mH. If the inductances of the coils are 40 mH and 50 mH respectively, the coefficient of coupling is 0.577. 0.01. 0.477. 0.447. 0.577. 0.01. 0.477. 0.447. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory Two identical circular coils, one closed and another is little split (not enclosed) are placed in an uniform magnetic field which decrease at a constant rate. If the plane to the coils are perpendicular to the field which of the following statements is true? An emf is induced in both coils. An emf is induced in split coil. Equal joule heating occurs in both coils. Joule heating does not occur in each of the coils. An emf is induced in both coils. An emf is induced in split coil. Equal joule heating occurs in both coils. Joule heating does not occur in each of the coils. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory When a current carrying conductor is brought into magnetic field, the force that moves the conductor depends upon None of these The weight of the conductor The value of current The direction of the conductor None of these The weight of the conductor The value of current The direction of the conductor ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory A waveguide operated below cut off frequency can be used as Phase shifter An attenuator An isolator None Phase shifter An attenuator An isolator None 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 Rain drops may not collect Dust particles may not accumulate Charge per unit area becomes very high for lightening to discharge None of these Rain drops may not collect Dust particles may not accumulate ANSWER DOWNLOAD EXAMIANS APP
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