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 187 At 18.75 At 30 At 300 At 187 At 18.75 At 30 At 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 increases decreases remains unchanged reverses polarity increases decreases remains unchanged 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? 4 AT 8 AT 10 AT 16 AT 4 AT 8 AT 10 AT 16 AT ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism The retentivity of material is useful for the construction of Non-magnetic substances Transformers Electromagnets Permanent magnets Non-magnetic substances Transformers Electromagnets Permanent magnets 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 Increases Remain same None of the listed here Decreases Increases Remain same None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism For which of the following materials the net magnetic moment should be zero? ferrimagnetic materials antiferromagnetic materials diamagnetic materials antiferrimagnetic materials ferrimagnetic materials antiferromagnetic materials diamagnetic materials antiferrimagnetic materials ANSWER DOWNLOAD EXAMIANS APP
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