In the free space, the magnetic strength of the magnetic field of infinite plane current (excluding the thickness of the plane current) is [img=14x24]1803b72d2d865c9.png[/img]=______.
A: μ0i, whose direction is the same as the current
B: μ0i/2, whose direction is the same as the current
C: μ0i, whose direction is perpendicular to the current
D: μ0i/2, whose direction is perpendicular to the current
A: μ0i, whose direction is the same as the current
B: μ0i/2, whose direction is the same as the current
C: μ0i, whose direction is perpendicular to the current
D: μ0i/2, whose direction is perpendicular to the current
举一反三
- Semiconductor<br/>with a current is placed in a magnetic field perpendicular to the<br/>current and it induced electric field in the direction. This<br/>phenomenon is known as the ______ .
- A wire carries current in the plane of this paper toward the top of the page. The wire experiences a magnetic force toward the right edge of the page. The direction of the magnetic field causing this force is: A: in the plane of the page and toward the left edge. B: in the plane of the page and toward the bottom edge. C: upward out of the page. D: downward into the page.
- What is the net force on a magnetic dipole in a uniform magnetic field [img=14x24]1803a3749667c37.png[/img]? A: Nonzero and in the direction of [img=14x24]1803a3749f40258.png[/img]. B: Nonzero and in the direction of [img=28x26]1803a374a7784ea.png[/img]. C: Nonzero and perpendicular to [img=14x24]1803a3749f40258.png[/img].[img=14x24]1803a3749f40258.png[/img] D: zero.
- 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
- 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