Magnetism and Electromagnetism What is the magnetomotive force in a 75-turn coil of wire when there are 4 A of current through it? 18.75 At 300 At 187 At 30 At 18.75 At 300 At 187 At 30 At ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism A square cross-sectional magnet has a pole strength of 1 x 10 Wb and cross sectional area of 20 mm x 20 mm. What is the strength at a distance of 100 mm from the unit pole in air ? 6338 N/Wb 633.8 N/Wb 63.38 N/Wb 63380 N/Wb 6338 N/Wb 633.8 N/Wb 63.38 N/Wb 63380 N/Wb ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism For a given wire-wound core, an increase in current through the coil Reverses the flux lines Increases the flux density Causes no change in flux density Decreases the flux density Reverses the flux lines Increases the flux density Causes no change in flux density Decreases the flux density ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism When a solenoid is activated, the force that moves the plunger is an electromagnetic field a steady current varying voltage a permanent magnetic field an electromagnetic field a steady current varying voltage a permanent magnetic field 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 16 AT 10 AT 4 AT 8 AT 16 AT 10 AT ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism Indicate which of the following material does not retain magnetism permanently. Stainless steel None of the listed here Soft iron Hardened steel Stainless steel None of the listed here Soft iron Hardened steel ANSWER DOWNLOAD EXAMIANS APP
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