? 1.5A|-1.5A|2.1A|-2.1A
举一反三
- <img src="http://edu-image.nosdn.127.net/71A448760C52ECDFD18872E9B72EDB68.PNG?imageView&thumbnail=520x520&quality=100" />? 0<br >|1<br >|2<br >|3<br >
- <img src="http://edu-image.nosdn.127.net/94BA9A5B35831938F42CE4652A023518.jpg?imageView&thumbnail=520x520&quality=100" />?
- 在边长为l的立方箱中运动的质量为m的自由粒子最低能级的能量是 。? 0<br >|<img src="http://edu-image.nosdn.127.net/25BE3F370428717C866537A7D7C844D5.PNG?imageView&thumbnail=520x520&quality=100" />|<img src="http://edu-image.nosdn.127.net/510E594B10F3DC61959F5AE3038F09D8.PNG?imageView&thumbnail=520x520&quality=100" />|<img src="http://edu-image.nosdn.127.net/06DF85CB1CE475D5CB97DC45131A1C60.PNG?imageView&thumbnail=520x520&quality=100" />
- 图示电路中，已知电流源<img src="http://edu-image.nosdn.127.net/85902C91DE56CAB93E99D0255A23B10D.JPG?imageView&thumbnail=520x520&quality=100" />互感M=1H，a、b两端的开路电压为 ; ;;V。<br ><img src="http://edu-image.nosdn.127.net/C852E58D8231E03C27740A58A548D688.JPG?imageView&thumbnail=520x520&quality=100" />?
- <img src="http://edu-image.nosdn.127.net/1701CBC9FFD5E8DDE9299B07D6FC9F28.jpg?imageView&thumbnail=520x520&quality=100" />? 错误|正确