A 0.79-m aluminum bar is held with its length parallel to the east-west direction and dropped from a bridge. Just before the bar hitsthe river below, its speed is 16 m/s, and the emf induced across its length is 5.9 × 10-4 V. Assuming the horizontal component of theEarth's magnetic field at the location of the bar points directly north, (a) determine the magnitude of the horizontal component of theEarth's magnetic field, and (b) state whether the east end or the west end of the bar is positive.(a) Number i(b)Units

Answered: Image /qna-images/answer/47ae9f1c-9740-4409-af9a-a9d45811cfa4.jpg

Answered: A 0.79-m aluminum bar is held with its…

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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At a certain location, the Earth’s magnetic field has a magnitude of 5.4 * 10-5T and points in a direction that is 68° below thehorizontal. Find the magnitude of the magnetic flux through thetop of a desk at this location that measures 76 cm by 45 cm
At a particular point on Earth, the magnitude of the Earth's magnetic field is 3.50 x 10-5 T. At this point, the field through a small square loop is essentially uniform. The area of the loop is 30.0 cm2. What is the magnitude of the magnetic flux (in T: m2) through the loop when the loop is at the following orientations? (a) the magnetic field is perpendicular to the plane of the loop 1.05*10**-3 X T. m2 (b) the magnetic field and the normal to the plane of the loop are at a 20.0° angle 6.68*10**-8 T.m2 (c) the magnetic field and the normal to the plane of the loop are at a 90.0° angle T.m?
Sodium ions (Na+) move at 0.846 m/s through a bloodstream in the arm of a person standing near a large magnet. The magnetic field has a strength of 0.254 T and makes an angle of 63.0° with the motion of the sodium ions. The arm contains 90.0 cm³ of blood with a concentration of 4.00 × 1020 Na+ ions per cubic centimeter. If no other ions were present in the arm, what would be the magnetic force on the arm? N Need Help? Read It
A 2.00-m length of wire is held in an east−west direction and moves horizontally to the north with a speed of 15.0 m/s. The vertical component of Earth’s magnetic field in this region is 40.0 μT directed downward. Calculate the induced emf between the ends of the wire and determine which end is positive.
To monitor the breathing of a hospital patient, a thin belt is girded around the patient’s chest. The belt is a 132 turn coil. When the patient inhales, the area encircled by the coil increases by 28.0 cm2. The magnitude of Earth’s magnetic field is 50.0 μT and makes an angle of 71.0° with the plane of the coil. (b) Assuming a patient takes 2.50 s to inhale, find the magnitude of the average induced emf in the coil during that time.
Some possibly useful numbers = 8.99 x 10° N m2/C2 €0 = 8.85 x 10-12C²/Nm2 4TEO %3D = 10-7Tm/A e = 1.6 x 1019 C me = 9.11 x 10-31kg mp = 1.67 x 10-27kg %3D leV = 1.6 x 10-19 J
An MRI technician moves his hand from a region of very low magnetic field strength into an MRI scanner's 1.60 T field with his fingers pointing in the direction of the field. Find the magnitude of the average emf (in V) induced in his wedding ring, given its diameter is 2.26 cm and assuming it takes 0.210 s to move it into the field.
An airplane is flying due north at 720 km/h. The Earth’s magnetic field has a northward component of 0.020 mT and a downward component of 0.050 mT (Southern Indiana). (a) If the wingspan (distance between wingtips) is 35 m, what is the motional emf between the wingtips? (b) Which wingtip has the higher electric potential?
Near San Francisco, where the vertically downward component of the earth's magnetic field is 6.4 x 10-5 T, a car is traveling forward at 24 m/s. The width of the car is 2.4 m. Find the emf induced between the two sides of the car. If positive charge accumulates on the driver's side, the enter the emf as a positive number. If negative charge accumulates on the driver's side, the enter the emf as a negative number.
How much current must pass through a horizontal power transmission cable in order for the magnetic field at a location 21 m directly below it to be equal to the Earth's magnetic field, which is approximately 8.0 x 10-5 T? Express your answer to two significant figures and include appropriate units. Value Units ?
Assume the magnitude of the magnetic field outside a sphere of radius R is B= B0(R/r)2, where B0 is a constant. (a) Determine the total energy stored in the magnetic field outside the sphere. (b) Evaluate your result from part (a) for B0 = 5.00 × 10-5 T and R = 6.00 × 106 m, values appropriate for the Earth’s magnetic field.

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