Magnetism and Electromagnetism What is the magnetomotive force (mmf) of a wire with 8 turns carrying three amperes of current? 2.4 At 24 At 2,400 At 240 At 2.4 At 24 At 2,400 At 240 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? Decreases First increases and then decreases depending on the depth of iron in¬sertion Increases Remains same Decreases First increases and then decreases depending on the depth of iron in¬sertion Increases Remains same ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism The unit of relative permeability is Its dimensionless Hennry/meter None of the listed here Hennry Its dimensionless Hennry/meter None of the listed here Hennry ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism When two ends of a circular uniform wire are joined to the terminals of a battery, the field at the center of the circle will be infinite will depend on the radius of the circle will depend on the amount of e.m.f. applied will be zero will be infinite will depend on the radius of the circle will depend on the amount of e.m.f. applied will be zero ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism The two conductors of a transmission line carry equal current I in opposite directions. The force on each conductor is proportional to X inversely proportional to I proportional to distance between the conductors proportional to 7 proportional to X inversely proportional to I proportional to distance between the conductors proportional to 7 ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism A keeper is used to Restore lost flux Provide a closed path for flux Change the direction of magnetic lines Amplify flux Restore lost flux Provide a closed path for flux Change the direction of magnetic lines Amplify flux ANSWER DOWNLOAD EXAMIANS APP
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