Magnetism and Electromagnetism The most effective and quickest may of making a magnet from soft iron is by 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 Rubbing with another magnet ANSWER DOWNLOAD EXAMIANS APP
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 Decrease Increase Remain Constant Be excessive Decrease Increase Remain Constant Be excessive ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism The use of permanent magnets is. not made in None of the listed here Energy meters Transformers Loud speakers None of the listed here Energy meters Transformers Loud speakers ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism When the current through the coil of an electromagnet reverses, the magnetic field collapses magnetic field expands direction of the magnetic field remains unchanged direction of the magnetic field reverses magnetic field collapses magnetic field expands direction of the magnetic field remains unchanged direction of the magnetic field reverses 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? 187 At 18.75 At 30 At 300 At 187 At 18.75 At 30 At 300 At ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism The stray line of magnetic flux is defined as The mean length of a ring shaped coil A line of magnetic flux in a non-uniform field A line of magnetic flux which does not follow the designed path A line vertical to the flux lines The mean length of a ring shaped coil A line of magnetic flux in a non-uniform field A line of magnetic flux which does not follow the designed path A line vertical to the flux lines ANSWER DOWNLOAD EXAMIANS APP
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