Magnetism and Electromagnetism An electromagnetic field exists only when there is an increasing current decreasing current voltage current an increasing current decreasing current voltage current 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? 91.7 T 91 T 9.7 T 917 T 91.7 T 91 T 9.7 T 917 T ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism The induced voltage across a coil with 250 turns that is located in a magnetic field that is changing at a rate of 8 Wb/s is 3,125 V 2,000 V 31.25 V 1,000 V 3,125 V 2,000 V 31.25 V 1,000 V ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism The electromagnet has 50 turns and a current of 1A flows through the coil. If the length of the magnet circuit is 200 mm, what is the magnetic field strength? 25 AT/m 250 AT/m 2500 AT/m 0.25 AT/m 25 AT/m 250 AT/m 2500 AT/m 0.25 AT/m ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism For a given wirewound core, an increase in current through the coil increases the flux density 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 ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism The induced voltage across a stationary conductor in a stationary magnetic field is decreased reversed in polarity zero increased decreased reversed in polarity zero increased ANSWER DOWNLOAD EXAMIANS APP