Magnetism and Electromagnetism What is the magneto-motive force (mmf) of a wire with 8 turns carrying three amperes of current? 24 At 2.4 At 2,400 At 240 At 24 At 2.4 At 2,400 At 240 At ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism Which of the following is the unit of magnetic flux density? Tesla Weber None of the listed here Lumens Tesla Weber None of the listed here Lumens ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism In a simple magnetic field the strength of magnet flux decreases continuously from initial value to final value first increases and then decreases till it becomes zero increases continuously from initial value to final value is constant and has same value in energy part of the magnetic field decreases continuously from initial value to final value first increases and then decreases till it becomes zero increases continuously from initial value to final value is constant and has same value in energy part of the magnetic field ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism The electromagnet has 50 turns and a current of 1A flows through the coil. If the length of the magnet circuit is 200 mm, what is the magnetic field strength? 2500 AT/m 25 AT/m 0.25 AT/m 250 AT/m 2500 AT/m 25 AT/m 0.25 AT/m 250 AT/m ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism Fleming's left hand rule is used to find Polarity of a magnetic pole Direction of flux in a solenoid Direction of force on a current carrying conductor in a magnetic field Direction of magnetic field due to current carrying conductor Polarity of a magnetic pole Direction of flux in a solenoid Direction of force on a current carrying conductor in a magnetic field Direction of magnetic field due to current carrying conductor ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism The magnetic reluctance of a material Any of the listed here Increases with increasing cross-sec-tional area of material Does not vary with increasing cross-sectional area of material Decreases with increasing cross sectional area of material Any of the listed here Increases with increasing cross-sec-tional area of material Does not vary with increasing cross-sectional area of material Decreases with increasing cross sectional area of material ANSWER DOWNLOAD EXAMIANS APP
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