Magnetism and Electromagnetism What is the magneto-motive force (mmf) of a wire with 8 turns carrying three amperes of current? 24 At 2,400 At 2.4 At 240 At 24 At 2,400 At 2.4 At 240 At ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism How does the magnetic compass needle behave in a magnetic field? It starts rotating None of the listed here It assures a position which follows a line of magnetic flux It assures a position right angle to magnetic field It starts rotating None of the listed here It assures a position which follows a line of magnetic flux It assures a position right angle to magnetic field ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism The magnetism left in the iron after exciting field has been removed is known as residual magnetism permeance reluctance susceptance residual magnetism permeance reluctance susceptance ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism Out of the following statements, concerning an electric field, which statement is not true? An electric field is defined as a point in space at which an electric charge would experience a force The electric field intensity at a point is numerically equal to the force exerted upon a charge placed at that point The electric intensity is a vector quantity Unit field intensity in the exertion of a force of one newton on a charge of one coulomb An electric field is defined as a point in space at which an electric charge would experience a force The electric field intensity at a point is numerically equal to the force exerted upon a charge placed at that point The electric intensity is a vector quantity Unit field intensity in the exertion of a force of one newton on a charge of one coulomb 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 Decrease Remain Constant Be excessive Increase Decrease Remain Constant Be excessive Increase ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism Strength of an electromagnet can be increased by Increasing the cross-sectional area Increasing current supply All of the listed here Increasing the number of turns Increasing the cross-sectional area Increasing current supply All of the listed here Increasing the number of turns ANSWER DOWNLOAD EXAMIANS APP
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