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1. |
If the current element represented by 4 × 10-4 ây Amp-m is placed in a magnetic field of \(\bar H = \frac{{5{{\hat a}_x}}}{\mu }A/m\), the force on the current element is |
A. | -2.0 âz mN |
B. | 2.0 âz mN |
C. | -2.0 âz N |
D. | 2.0 âz N |
Answer» B. 2.0 âz mN | |