根据安培环路定理∮B·dl=μ0I,安培环路上的B仅由式中的I产生。
根据安培环路定理∮B·dl=μ0I,安培环路上的B仅由式中的I产生。
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以下程序的运行结果是( ) #define MAX 10 int a[MAX],i; main() { printf("\n");sub1();sub3(A) ,sub2(),sub3(A) ; } sub2() { int a[MAX],i,max; max=5; for(i=0;i<max;i++)a[i]=i; } sub1() {for(i=0;i<MAX;i++)a[i]=i+i; } sub3(int a[]) { int i; for(i=0;i<MAX,i++)printf("%d",a[i]); printf("\n"); }A.0 2 4 6 8 10 12 14 16 18 0 1 2 3 4B.0 1 2 3 4 0 2 4 6 8 10 12 14 16 18C.0 1 2 3 4 5 6 7 8 9 0 1 2 3 4D.0 2 4 6 8 10 12 14 16 18 0 2 4 6 8 10 12 14 16 18
单击一次命令按钮之后,窗体中的输出结果为______。 Private Sub Command1_ Click() Dim a As Integer, b As Integer For i = 1 To 6 a=i*i+i Next i Call writein(a,B)Print a, b End Sub Sub writein(a, ByValB)b = 1 For i = 1 To 6 a=b* 4 b = b + 1 Next i End SubA.24 6B.24 0C.12 6D.12 0
在窗体上画一个名称为CoilTlilandl的命令按钮,然后编写如下事件过程: Private Sub command1 Click() Dim m As Integer, i As Integer, x(3)As Integer For i=0 To 3:x(i)=i:Next i For i = 1 To 2: Call sub1(x,i):Next i For i = 0 To 3: Print x(i);: Next i End Sub Private Sub sub1(a()As Integer,k As Integer) Dim i As Integer Do a(k)=a(k)+a(k+1) j = j + 1 Loop While j < 2 End Sub 程序运行后,单击命令按钮,则窗体上显示的内容是A.0 3 7 5B.0 1 2 3C.3 2 4 5D.0 5 8 3
以下能够正确计算1+2+3+…+10的程序是A.Private Sub Command1_Click() Sum=0 ForI=1 To 10 Sum=Sum+I Next I Print Sum End SubB.Private Sub Command1_Click() Sum=0,I=1 Do While I<=10 Sum=Sum+I I=I+1 Print Sum End SubC.Private Sub Command1_Click() Sum=0: I=1 Do Sum=Sum+I I=I+1 Loop While I<10 Print Sum End SubD.Private Sub Command1_Click() Sum=0: I=1 Do Sum=Sum+I I=I+1 Loop Until I<10 Print Sum End Sub
以下能够正确计算1+2+3+…+10的程序是A.Private sub Command1_Click( ) sum=0 For 1=1 To 10 Sum=sum+1, Next I Print Sum End SubB.Private sub Command1_Click( ) Sum=0,I=1 Do While l<=10 Sum=Sum+1 I=I+1 Print Sum End SubC.Private Sub command1_click( ) Sum=0:I=1 Do Sum=Sum+1 I=I+1 Loop While I<10 Print Sum End SubD.Private Sub command1_Click( ) Sum=0:I=1 Do Sum=Sum+1 l=I+1 Loop Until I<10 Print Sum End Sub
9.程序执行结果s的值是 [9] 。Private Sub Commandl_Click()i = 0Doi = i + ls = i + sLoop Until i = 4Print sEnd Sub
class Super { public int i = 0; public Super(String text) { i = 1; } } public class Sub extends Super { public Sub(String text) { i = 2; } public static void main(String args[]) { Sub sub = new Sub(“Hello”); System.out.println(sub.i); } } What is the result?() A、 0B、 1C、 2D、 Compilation fails.
若空间存在两根无限长直载流导线,空间的磁场分布就不具有简单的对称性,则该磁场分布()。A、不能用安培环路定理来计算B、可以直接用安培环路定理求出C、只能用毕奥-萨伐尔-拉普拉斯定律求出D、可以用安培环路定理和磁感应强度的叠加原理求出
根据安培环路定理,下面哪些是正确的结论:()A、如果环路L上B处处为0,就没有净电流穿过环路LB、如果没有电流穿过环路L,则环路L上B处处为0C、如果环路L上B处处不为0,穿过环路L的净电流不为0D、以上说法都不正确
若空间存在两根无限长直载流导线,空间的磁场分布就不具有简单的对称性,则该磁场分布()A、不能用安培环路定理来计算B、可以直接用安培环路定理求出C、只能用毕奥-萨伐尔定律求出D、可以用安培环路定理和磁感强度的叠加原理求出
单选题class Super { public int i = 0; public Super(String text) { i = 1; } } public class Sub extends Super { public Sub(String text) { i = 2; } public static void main(String args[]) { Sub sub = new Sub(“Hello”); System.out.println(sub.i); } } What is the result?()A 0B 1C 2D Compilation fails.
单选题class super ( public int I = 0; public super (string text) ( I = 1 ) ) public class sub extends super ( public sub (string text) ( i= 2 ) public static void main (straing args) ( sub sub = new sub (“Hello”); system.out. PrintIn(sub.i); ) ) What is the result?()A Compilation will fail.B Compilation will succeed and the program will print “0”C Compilation will succeed and the program will print “1”D Compilation will succeed and the program will print “2”
单选题正态分布时,算术平均数、中位数、众数的关系为()Amsub0/sub<msube/sub<(xBmsub0/sub=msube/sub=(xCmsub0/sub>msube/sub>(xDmsube/sub<msub0/sub<(x