1.

Find the electric field when the magnetic field is given by 2sin t in air.

A. 8π x 10<sup>-7</sup> cos t
B. 4π x 10<sup>-7</sup> sin t
C. -8π x 10<sup>-7</sup> cos t
D. -4π x 10<sup>-7</sup> sin t
Answer» B. 4‚âà√¨‚àö√ë x 10<sup>-7</sup> sin t


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