12. Which picture best represents the magnetic field lines (light lines) due to

Question

12. Which picture best represents the magnetic field lines (light lines) due to the current(s) / passing through the wire(s)? [Figure A shows a circular loop of current perpendicular to the page. B shows two wires perpendicular to the page with current out of the page. 13. The diagram shows the setup similar to this unit's experiment, except that the coils are connected to separate power supplies so the currents aren't necessarily the same. Point P is on the front of the upper coil. Given the values D- 22 cm, r = 1.8 cm, N1-40, N2-75, h-2-0 A, 12 -6.0 A, what is the magnetic field strength at point P due to the lower coil? Point P A. 1.6 x 10T B. 5.0 x 103 T C, 6.7 × 10-5 T D, 2.8 × 10-1 T E, 1.7×10-3 T F, 4.1x10-4 T

Explanation / Answer

12.B and D are correct represntations

13.

magnetic field due to Circular Current is due to lower coil is

B = uo N2 I2/2r

B = (4pi *10^-7* 75 * 6)/(2* 0.018)

B = 1.57 *10^-2 tesla

B = 1.6 *10^-2 T

option A  

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