Magnetism and Electromagnetism What is the mmf of a wire with 8 turns carrying three amperes of current? 0.24 AT 240 AT 2.4 AT 24 AT 0.24 AT 240 AT 2.4 AT 24 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? Increases Decreases Remains same First increases and then decreases depending on the depth of iron in¬sertion Increases Decreases Remains same First increases and then decreases depending on the depth of iron in¬sertion ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism The main constituent of permalloy is Chromium Tungsten Nickel Cobalt Chromium Tungsten Nickel Cobalt ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism A 300 mm long conductor is carrying a current of 10 A and is situated at right angles to a magnetic field having a flux density of 0.8 T ; the force on the conductor will be 2.4 N 24 N 240 N 0.24 N 2.4 N 24 N 240 N 0.24 N ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism If a loop in a basic dc generator suddenly begins rotating at a faster speed, the induced voltage reverses polarity decreases increases remains unchanged reverses polarity decreases increases remains unchanged ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism The attraction capacity of electromagnet will increase if the Flux density increases Core length increases Core area increases Flux density decreases Flux density increases Core length increases Core area increases Flux density decreases ANSWER DOWNLOAD EXAMIANS APP
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