Magnetism and Electromagnetism Ferrites are a sub-group of Non-magnetic materials Paramagnetic material Ferro magnetic material Ferri-magnetic material Non-magnetic materials Paramagnetic material Ferro magnetic material Ferri-magnetic material ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism An electromagnetic field exists only when there is voltage current decreasing current an increasing current voltage current decreasing current an increasing current ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism When the current through the coil of an electromagnet reverses, the direction of the magnetic field reverses magnetic field expands direction of the magnetic field remains unchanged magnetic field collapses direction of the magnetic field reverses magnetic field expands direction of the magnetic field remains unchanged magnetic field collapses ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism The ability of a material to remain magnetized after removal of the magnetizing force is known as reluctance permeability retentivity hysteresis reluctance permeability retentivity hysteresis ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism The unit for reluctance is At/m Wb At/Wb tesla At/m Wb At/Wb tesla ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism What is the reluctance of a material that has a length of 0.07 m, a cross-sectional area of 0.014 m2, and a permeability of 4,500 Wb/At × m? 111 At/Wb 1 At/Wb 1111 At/Wb 11 At/Wb 111 At/Wb 1 At/Wb 1111 At/Wb 11 At/Wb ANSWER DOWNLOAD EXAMIANS APP
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