A circular region 4.00 m in radius is filled with an electric field perpendicular to the face of the circle. The magnitude of the field in the circle varies with radius and time as E(r, t) = Arcos (@t) where A = 1000. V/m² and w = 3.00 x 10⁹ s¨¹. What is the maximum value of the magnetic field at the edge of the region? i T

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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

A high-voltage power line 20 m above the ground carries a current of 2000 A horizontally to the ground. What is the magnitude of the magnetic field at ground-level directly under the power line?

(b) Figure 6 shows a metal plate moves with constant velocity through a uniform magnetic field, B. The magnitude of the magnetic field is 2.0 mT directed perpendicular to the plate. The dimension of the plate is 5.0 cm long, 0.5 cm wide and 1.0 mm thick. If the metal plate moves with the speed of 1.0 m/s, calculate the potential difference generated between points x and y across the plates. х В Figure 6

A pickup truck has a width of 79.9 in. If it is traveling north at 36 m/s through a magnetic field with vertical component of 37 µT, what magnitude emf is induced between the driver and passenger sides of the truck? mV Need Help? Read It

The answers 0 and 7.0*10^-6 are incorrect; I have one more shot at this question. Please help.

A charge moves out of a radiation source with the velocity to the left. Once it enters a uniform magnetic field B it moves upward. What is the type of charge

QB2d. Calculate the EMF induced in the railway carriage wheel of radius R=840 mm by the magnetic field of the Earth. Consider that the magnetic field of the Earth makes an angle of 71.5 deg with the horizontal surface of the railway track. Take the speed of the carriage to be v = = 158 km h¹ and the value of the magnetic field of the Earth B = 10-5 T. Provide your answer in microvolts (10-6 V=1 μV): for example, if you calculated the value to be 0.000075 V, then enter 75 as your answer. Enter your answer in the box below.

Q28.19 (a) How large a current would a very long, straight wire have to carry so that the magnetic field 2.00 cm from the wire is equal to 1.00 G (comparable to the earth’s northward-pointing magnetic field)? (b) If the wire is horizontal with the current running from east to west, at what locations would the magnetic field of the wire point in the same direction as the horizontal component of the earth’s magnetic field? (c) Repeat part (b) except the wire is vertical with the current going upward.