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For a toroid to extract the energy from the supply system, the flux linkages of the magnetic field must be ________

For a toroid to extract the energy from the supply system, the flux linkages of the magnetic field must be ________ Correct Answer changing or varying

dWelec=idφ=eidt, where dWelec = differential electrical energy to coupling field, and if the flux linkages are either constant or zero, i.e, dφ=0, then dWelec=0.

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