Magnetism and Electromagnetism What is the magneto-motive force in a 75-turn coil of wire when there are 4 A of current through it? 100 At 150 At 300 At 200 At 100 At 150 At 300 At 200 At ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism For a given wirewound core, an increase in current through the coil increases the flux density reverses the flux lines decreases the flux density causes no change in flux density increases the flux density reverses the flux lines decreases the flux density causes no change in flux density ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism The commonly used material for shielding or screening magnetism is Aluminium Copper Soft iron Brass Aluminium Copper Soft iron Brass ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism If the cross-sectional area of a magnetic field increases, but the flux remains the same, the flux density doubles decreases increases remains the same doubles decreases increases remains the same ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism When a solenoid is activated, the force that moves the plunger is a permanent magnetic field an electromagnetic field varying voltage a steady current a permanent magnetic field an electromagnetic field varying voltage a steady current ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism When the north poles of two bar magnets are brought close together, there will be a downward force a force of repulsion a force of attraction no force a downward force a force of repulsion a force of attraction no force ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS