Magnetism and Electromagnetism What is the magnetomotive force in a 75-turn coil of wire when there are 4 A of current through it? 300 At 30 At 187 At 18.75 At 300 At 30 At 187 At 18.75 At ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism A certain amount of current flows through a ring shaped coil with fixed number of turns. How does the magnetic induction B varies inside the coil if an iron core is threaded into coil without dimensional change of coil? First increases and then decreases depending on the depth of iron in¬sertion Decreases Increases Remains same First increases and then decreases depending on the depth of iron in¬sertion Decreases Increases Remains same 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 What is the magnetomotive force (mmf) of a wire with 8 turns carrying three amperes of current? 240 At 2.4 At 24 At 2,400 At 240 At 2.4 At 24 At 2,400 At ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism The main constituent of permalloy is Cobalt Tungsten Chromium Nickel Cobalt Tungsten Chromium Nickel ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism Air gap has_______eluctance as compared to iron or steel path higher lower zero little higher lower zero little ANSWER DOWNLOAD EXAMIANS APP
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