horizontal xy-plane. 1) A 2.0-m long conducting wire is formed into a square and

Question

horizontal xy-plane. 1) A 2.0-m long conducting wire is formed into a square and pla A uniform magnetic field is oriented 30.0 above the horizontal with a strength of is the magnetic flux through the square? a) 1.5 b) 1 Tm2 c) 0.5 Tm d) 0.25 Tm2 e) 1.75 Tm 2) The figure shows three metal coils labeled A, B, and C heading towards a region where a uniform static magnetic field exists. The coils move with the same constant velocity and all have the same resistance. Their relative sizes are indicated by the background grid. As they enter the magnetic field the coils will have an induced electric current in them. For which coil will the current be the greatest? ! a) A b) B c) c d) No current at any of them e) Currents will be the same

Explanation / Answer

side of square = 2 / 4 = 0.5

Area = 0.5 * 0.5

magnetic flux = B A sin theta

= 2 * 0.52 * sin 30

= 0.25 Wb = 0.25 T.m2 [option d]

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