In Ampere\'s law. Countourintegral B^rightarrowdl^rightarrow=mu_0I_enclosed, the

Question

In Ampere's law. Countourintegral B^rightarrowdl^rightarrow=mu_0I_enclosed, the symbol dl^rightarrow is: an infinitesimal piece of the >>uc that carries current I_enclosed. in the direction of B^rightarrow perpendicular to B^rightarrow a vector whose magnitude is the length of the wire that carries current I none of the above A long straight wire carrying a 3.0 A current enters a room through a window 1.5 m high and 1.0 m wide. The path integral Countourintegral^ B^rightarrow middot dl^rightarrow around the window frame has the value (in T.m): 0.20 2.5 times 10^-7 3.0times10^-7 3.8 times 10^-6 none of

Explanation / Answer

23. C

24. D (simply Uo*I=4*pi*10^-7*3A=3.8*10^-6)

25. B

26. D

27. A

28. B

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