If L < C, the electic field is always smaller than the magnetic field. If L > C, the electic field is always smaller than the magnetic field. When one field is at maximum strength, the other is at zero strength. When one field is at its maximum, the other is also at its maximum. When one field is at maximum strength, the other is at minimum strength.
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- In this example, we use = BA cos o to solve for the strength of a magnetic field. A plane surface with area 2.0 cm² is placed in a uniform magnetic field that is oriented at an angle of 30° to the surface. (a) What is the angle o? (b) If the magnetic flux through this area is 0.54 mWb, what is the magnitude of the magnetic field? 18 = B 30% For the same B and A, find the angle at which the flux would have one half the value given above (.e., the angle at which g2.7 x 10 Wb). Express your answer in degrees. Submit A ΠΑΠ ΑΣΦ 4 A C Demidn Enthaals Request Answer 60° ?Irrigation channels that require regular flow monitoring are often equipped with electromagnetic flowmeters in which the magnetic field is produced by horizontal coils embedded in the bottom of the channel. A particular coil has 100 turns and a diameter of 6.0 m. When it’s time for a measurement, a 5.0 A current is turned on. The large diameter of the coil means that the field in the water flowing directly above the center of thecoil is approximately equal to the field in the center of the coil.a. What is the magnitude of the field at the center of the coil?b. If the field is directed downward and the water is flowing east, what is the direction of the force on a positive ion in the water above the center of the coil?c. If the water is flowing above the center of the coil at 1.5 m/s, what is the magnitude of the force on an ion with a charge +e?The magnetic field has been measured to be horizontal everywhere along a square path of sides a = 40 cm, as shown in figure. Along the bottom the average magnetic field is B₁ = 4.26x 10-5 T. Along the sides the average magnetic field is B₂ = 0.0741 T. The total current in the area that is surrounded by the square path is out of the page and of magnitude I = 9.63 A. B3 a) B3 = B₂ 11___ a B₁ What is the magnitude of the average magnetic field at the top? b) If the current was doubled and its direction was into the page, what would be the average magnetic field vector at the top? B3 k SI
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- A flat, rectangular surface with side lengths of 3.00 cm and 2.00 cm is in the xz-plane at y = 0. Calculate the magnitude of the flux through this surface produced by magnetic field B = (0.500 T)i - (0.300 T)j + (0.600 T)k. 3.60 x 10-4 Wb O-3.00 x 10-4 Wb -4.80 x 10-4 Wb 8.10 x 10-4 Wb -3.60 x 10-4 Wb 4.80 x 10-4 Wb -1.80 x 10-4 Wb 3.00 x 10-4 Wb 1.80 x 10-4 Wb -8.10 x 10-4 WbThe magnetic fields (in T) shown are distributed uniformly on each of the surfaces of the box. The box has dimensions 1x1x3 cm. What is the magnetic field strength and direction on the front surface? 2 4 3 2T in 2T out 6T in 6T out 3T in ЗТ outA short bar magnet of magnetic movement 5.25 × 10–2 J T-1 is placed with its axis perpendicular to the earth’s field direction. At what distance from the centre of the magnet, the resultant field is inclined at 45° with earth’s field on (a) its normal bisector and (b) its axis. Magnitude of the earth’s field at the place is given to be 0.42 G. Ignore the length of the magnet in comparison to the distances involved.
- The figure below shows two wires carrying currents of I = 5.20 A in opposite directions, separated by a distance d. Assume d = 9.2 cm. P, 2d· (a) Find the magnitude (in µT) and direction of the net magnetic field at a point halfway between the wires. magnitude HT direction ---Select--- (b) Find the magnitude (in µT) and direction of the net magnetic field at point P,, 9.2 cm to the right of the wire on the right. magnitude µT direction ---Select--- (c) Find the magnitude (in µT) and direction of the net magnetic field at point P,, 2d = 18.4 cm to the left of the wire on the left. magnitude µT direction ---Select--- (d) What If? Repeat parts (a) through (c) for the case where both wires carry currents in the same direction, upward in the figure. Find the magnitude (in µT) and direction of the net magnetic field at a point halfway between the wires. magnitude µT direction ---Select---A magnetic field of magnitude 0.52 T is directed vertically upward. (a) Find the magnetic flux through a flat surface of area 23 cm2 if the surface is vertical.(b) Find the magnetic flux through a flat surface of area 23 cm2 if the surface is horizontal.(c) Find the magnetic flux through a flat surface of area 23 cm2 if the surface is at angle of 67° with the horizontal.A magnetic field of magnitude 0.55 T is directed vertically upward. (a) Find the magnetic flux through a flat surface of area 23 cm2 if the surface is vertical.(b) Find the magnetic flux through a flat surface of area 23 cm2 if the surface is horizontal.(c) Find the magnetic flux through a flat surface of area 23 cm2 if the surface is at angle of 63° with the horizontal.