Magnetism and Electromagnetism The most effective and quickest may of making a magnet from soft iron is by Rubbing with another magnet The use of permanent magnet Placing it inside a coil carrying current Induction Rubbing with another magnet The use of permanent magnet Placing it inside a coil carrying current Induction ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism A permanent magnet Attracts only ferromagnetic substances Attracts all paramagnetic substances and repels others Attracts some substances and repels others Attracts ferromagnetic substances and repels all others Attracts only ferromagnetic substances Attracts all paramagnetic substances and repels others Attracts some substances and repels others Attracts ferromagnetic substances and repels all others 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 91 T 9.7 T 91.7 T 917 T 91 T 9.7 T 91.7 T ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism The relative permeability is less than unity is case of Paramagnetic material Ferromagnetic material Ferrits Diamagnetic material Paramagnetic material Ferromagnetic material Ferrits Diamagnetic material ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism What is the magnetomotive force (mmf) of a wire with 8 turns carrying three amperes of current? 240 At 2,400 At 24 At 2.4 At 240 At 2,400 At 24 At 2.4 At 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 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
EXAMIANS