Magnetism and Electromagnetism A permanent magnet Attracts only ferromagnetic substances Attracts ferromagnetic substances and repels all others Attracts some substances and repels others Attracts all paramagnetic substances and repels others Attracts only ferromagnetic substances Attracts ferromagnetic substances and repels all others Attracts some substances and repels others Attracts all paramagnetic substances and repels others ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism In a simple magnetic field the strength of magnet flux first increases and then decreases till it becomes zero is constant and has same value in energy part of the magnetic field decreases continuously from initial value to final value increases continuously from initial value to final value first increases and then decreases till it becomes zero is constant and has same value in energy part of the magnetic field decreases continuously from initial value to final value increases continuously from initial value to final value ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism There is 900 mA of current through a wire with 40 turns. What is the reluctance of the circuit if the flux is 400 Wb? 1,440 At/Wb 9,000 At/Wb 14,400 At/Wb 90,000 At/Wb 1,440 At/Wb 9,000 At/Wb 14,400 At/Wb 90,000 At/Wb ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism A permeable substance is one which is a strong magnet which is a bad conductor through which the magnetic lines of force can pass very easily which is a good conductor which is a strong magnet which is a bad conductor through which the magnetic lines of force can pass very easily which is a good conductor ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism Which of the following materials are diamagnetic? Copper Silver Silver and copper Iron Copper Silver Silver and copper Iron ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism Which of the following is the unit of magnetic flux density? Weber Tesla None of the listed here Lumens Weber Tesla None of the listed here Lumens ANSWER DOWNLOAD EXAMIANS APP
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