When the medium is magnetized, the molecular magnetic moment inside the paramagnetic material turns to the opposite direction of the external magnetic field
举一反三
- When the medium is magnetized, the molecular magnetic moment inside the paramagnetic material turns to the opposite direction of the external magnetic field A: 正确 B: 错误
- When the number of turns in a solenoid and its length are both doubled, the ratio of the magnitude of the new magnetic field inside to the magnitude of the original magnetic field inside is: A: 0.25 B: 0.50 C: 1 D: 2 E: 4
- If the magnetic field B through<br/>a loop of wire is increasing, the<br/>induced magnetic field will be A: in<br/>the same direction as B B: in<br/>the opposite direction as B C: perpendicular<br/>to B D: at<br/>an acute angle to B E: there<br/>is no induced magnetic field
- There is no magnetic field in an ideal conductor, but there is a magnetic field inside because of the surface current。
- When the external magnetic field is removed, most or all of the magnetism of soft magnetic materials will not be lost, and the coercivity is very large.