Given that the magnetic circuit of DC electromagnet. The voltage U is constant . How will the Magnetic flux [img=13x19]1803a2fab6cb10e.png[/img] change when the air gap length increases ( ).[img=455x406]1803a2fac3677ca.jpg[/img]
A: increase
B: decrease
C: remain unchanged
D: not sure
A: increase
B: decrease
C: remain unchanged
D: not sure
举一反三
- Given that the magnetic circuit of AC electromagnet. The voltage U is constant . How will the Magnetic flux [img=13x19]1803a2fa8f20802.png[/img] change when the air gap length increases ( ).[img=455x406]1803a2fa9d5f73f.jpg[/img] A: increase B: decrease C: remain unchanged D: not sure
- For a magne2c circuit with air gap, if the magneto-mo2ve force remains unchanged and the air gap length is increased (Rm increases), the magne2c flux in the air gap will ( ). A: not sure B: decrease C: increase D: remain the same
- What is the meaning of[img=31x25]17de809ba6b2a44.jpg[/img]?[img=362x202]17de809bb25fc43.jpg[/img] A: Permeability of the air gap B: Reluctance of the air gap C: Length of the air gap D: Length of the magnetic circuit
- A square current loop with length a on each side carries a current I. The loop is in a uniform magnetic field B. If the loop is in the stable equilibrium, the magnetic flux passing through the loop onlyby the uniform field is ( ). A: [img=30x22]1803a3748913c57.png[/img] B: 0 C: [img=44x24]1803a37490df0b1.png[/img] D: indeterminable
- A closed path followed by main magnetic flux is known as a ( ). A: Magnetic circuit B: Electric circuit C: Magnetic saturation circuit D: None of the above