Magnetism and Electromagnetism There is 900 mA of current through a wire with 40 turns. What is the reluctance of the circuit if the flux is 400 Wb? 90,000 At/Wb 1,440 At/Wb 14,400 At/Wb 9,000 At/Wb 90,000 At/Wb 1,440 At/Wb 14,400 At/Wb 9,000 At/Wb ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism The unit for reluctance is At/m Wb tesla At/Wb At/m Wb tesla At/Wb ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism A keeper is used to Change the direction of magnetic lines Amplify flux Provide a closed path for flux Restore lost flux Change the direction of magnetic lines Amplify flux Provide a closed path for flux Restore lost flux ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism Susceptibility is positive for ferromagnetic substances non-magnetic substances diamagnetic substances None of these ferromagnetic substances non-magnetic substances diamagnetic substances None of these ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism When two ends of a circular uniform wire are joined to the terminals of a battery, the field at the center of the circle will be infinite will be zero will depend on the amount of e.m.f. applied will depend on the radius of the circle will be infinite will be zero will depend on the amount of e.m.f. applied will depend on the radius of the circle ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism For a given wirewound core, an increase in current through the coil causes no change in flux density increases the flux density reverses the flux lines decreases the flux density causes no change in flux density increases the flux density reverses the flux lines decreases the flux density ANSWER DOWNLOAD EXAMIANS APP