In the plane of a square frame with resistance R=7 Ohm and side a=20 cm, a straight infinite conductor is located at a distance r=20 cm from the frame. The current strength in the conductor varies according to the law I=At^3, where A=2A/c^3. The conductor is parallel to one of the sides of the frame. Determine the current strength in the loop at the time t=10 s.
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