Magnetism and Electromagnetism A coil of wire is placed in a changing magnetic field. If the number of turns in the coil is decreased, the voltage induced across the coil will Be excessive Remain Constant Decrease Increase Be excessive Remain Constant Decrease Increase ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism What is the magneto-motive force in a 75-turn coil of wire when there are 4 A of current through it? 150 At 200 At 300 At 100 At 150 At 200 At 300 At 100 At ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism How does the magnetic compass needle behave in a magnetic field? It assures a position which follows a line of magnetic flux It starts rotating It assures a position right angle to magnetic field None of the listed here It assures a position which follows a line of magnetic flux It starts rotating It assures a position right angle to magnetic field None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism What is the magnetomotive force in a 75-turn coil of wire when there are 4 A of current through it? 18.75 At 30 At 187 At 300 At 18.75 At 30 At 187 At 300 At ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism What is the flux density in a magnetic field in which the flux in 0.1 m2 is 600 Wb? 6,000 T 600 T 6 T 600 T 6,000 T 600 T 6 T 600 T ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism When the current through the coil of an electromagnet reverses, the magnetic field expands magnetic field collapses direction of the magnetic field remains unchanged direction of the magnetic field reverses magnetic field expands magnetic field collapses direction of the magnetic field remains unchanged direction of the magnetic field reverses ANSWER DOWNLOAD EXAMIANS APP
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