Magnetism and Electromagnetism For a given wire-wound core, an increase in current through the coil Causes no change in flux density Reverses the flux lines Decreases the flux density Increases the flux density Causes no change in flux density Reverses the flux lines Decreases the flux density Increases the flux density ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism What is the flux density when the flux is 5.5 Wb and the cross-sectional area is 6 × 10–3 m2? 917 T 9.7 T 91.7 T 91 T 917 T 9.7 T 91.7 T 91 T ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism The unit for permeability is At/m Wb/At × m Wb At/Wb At/m Wb/At × m Wb At/Wb ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism What is the magneto-motive force (mmf) of a wire with 8 turns carrying three amperes of current? 2.4 At 240 At 2,400 At 24 At 2.4 At 240 At 2,400 At 24 At ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism A magnetic field exists around Iron Copper Moving Charges Aluminium Iron Copper Moving Charges Aluminium ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism What is the reluctance of a material that has a length of 0.07 m, a cross-sectional area of 0.014 m2, and a permeability of 4,500 Wb/At × m? 11 At/Wb 1111 At/Wb 111 At/Wb 1 At/Wb 11 At/Wb 1111 At/Wb 111 At/Wb 1 At/Wb ANSWER DOWNLOAD EXAMIANS APP
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