Magnetism and Electromagnetism An electromagnetic field exists only when there is decreasing current voltage an increasing current current decreasing current voltage an increasing current current ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism The most effective and quickest may of making a magnet from soft iron is by Rubbing with another magnet Placing it inside a coil carrying current The use of permanent magnet Induction Rubbing with another magnet Placing it inside a coil carrying current The use of permanent magnet Induction ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism When the current through the coil of an electromagnet reverses, the 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 magnetic field collapses ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism Which of the following is a ferromagnetic material? Aluminium Tungsten Nickel Copper Aluminium Tungsten Nickel Copper ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism The magnetomotive force is The passage of magnetic field through an exciting coil The voltage across the two ends of exciting coil The sum of all currents embraced by one line of magnetic field The flow of an electric current The passage of magnetic field through an exciting coil The voltage across the two ends of exciting coil The sum of all currents embraced by one line of magnetic field The flow of an electric current 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? 600 T 6 T 6,000 T 600 T 600 T 6 T 6,000 T 600 T ANSWER DOWNLOAD EXAMIANS APP
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