Magnetism and Electromagnetism A keeper is used to Restore lost flux Change the direction of magnetic lines Provide a closed path for flux Amplify flux Restore lost flux Change the direction of magnetic lines Provide a closed path for flux Amplify flux ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism A permeable substance is one Which is a bad conductor Which is a good conductor Through which the magnetic lines of force can pass very easily Which is a strong magnet Which is a bad conductor Which is a good conductor Through which the magnetic lines of force can pass very easily Which is a strong magnet ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism What will be the magnetic potential difference across the air gap of 2 cm length in magnetic field of 200 AT/m? 16 AT 8 AT 4 AT 10 AT 16 AT 8 AT 4 AT 10 AT 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 Decreases None of the listed here Increases Remain same Decreases None of the listed here Increases Remain same ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism A permanent magnet Attracts ferromagnetic substances and repels all others Attracts all paramagnetic substances and repels others Attracts only ferromagnetic substances Attracts some substances and repels others Attracts ferromagnetic substances and repels all others Attracts all paramagnetic substances and repels others Attracts only ferromagnetic substances Attracts some substances and repels others 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
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