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Scientific work is currently under way to determine whether weak oscillating magnetic fields can affect human health. For example, one study found that drivers of trains had a higher incidence of blood cancer than other railway workers, possibly due to long exposure to mechanical devices in the train engine cab. Consider a magnetic field of magnitude 1.00 × 10−3 T, oscillating sinusoidally at 60.0 Hz. If the diameter of a red blood cell is 8.00 μm, determine the maximum emf that can be generated around the perimeter of a cell in this field.
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Chapter 30 Solutions
Bundle: Physics for Scientists and Engineers with Modern Physics, Loose-leaf Version, 10th + WebAssign Printed Access Card for Serway/Jewett's Physics for Scientists and Engineers, 10th, Multi-Term
- Scientific work is currently underway to determine whether weak oscillating magnetic fields can affect human health. For example, one study found that drivers of trains had a higher incidence of blood cancer than other railway workers, possibly due to long exposure to mechanical devices in the train engine cab. Consider a magnetic field of magnitude 1.00 10-3 T, oscillating sinusoidally at 56.5 Hz. If the diameter of a red blood cell is 6.00 µm, determine the maximum emf that can be generated around the perimeter of a cell in this field.arrow_forwardA solenoid has a length of 0.5 meters, 200 turns, and carries a current of 3 amperes. Calculate the magnetic field inside the solenoid using the formula B = μonl (where B is the magnetic field strength, μo is the permeability of free space, n is the number of turns per unit length, and I is the current).arrow_forwardDetermine the speed with which the erythrocyte should move evenly with the observed erythrocyte sedimentation reaction. Consider the erythrocyte as a ball with a diameter of 9,7 µm. The density of the erythrocyte is 8,7 kg/m³, the density of blood plasma is 5,5 kg/m3. The viscosity of the blood plasma is 8 mPa s. Neglect the electrostatic expansion and magnetic properties of erythrocytes. Gravitational acceleration is taken equal to 10 m/s2. Give your answer in mm / hour.arrow_forward
- A V = 36 mV battery is connected to a single turn loop of dimensions a 15 cm by b = 8 cm has a resistance of R = 25.5 2. The loop is placed in a uniform magnetic field which is perpendicular to the plane of the loop. If the magnetic field is increasing at a rate of 0.9 T/sec, what is the magnitude and direction of the current in the circuit? B x x V T X X www The magnitude, I = x X x R X The direction: Select an answer X X x x x X Units Select an answer ✓ X x X x ххarrow_forwardA loop of wire with radius r= 0.081 m is in a magnetic field with magnitude B as shown in the graph. B changes from B1 = 0.34 T to B2= 6.5 T in At = 7.5 s at a constant rate. Express the magnetic flux going through a loop of radius r assuming a constant magnetic field B. Express the change in the magnetic flux going through this loop, AP, in terms of B , B2 and r. Calculate the numerical value of 4P in T m². Express the magnitude of the average induced electric field, E, induced in the loop in terms of 4P, r and At. E = Calculate the numerical value of E in N/C. E =arrow_forwardConsider the Hall voltage induced on a patient’s heart while being scanned by an MRI unit. l = 8.5 cmv = 7.5 cm/s Approximate the conducting path on the heart wall by a wire 8.5 cm long that moves at 7.5 cm/s perpendicular to a 1.50 T magnetic field. Find the Hall voltage across the patient's heart in mV.arrow_forward
- In an experiment designed to measure the Earth's magnetic field using the Hall effect, a copper bar 0.440 cm thick is positioned along an east-west direction. Assume n = 8.46 x 1028 electrons/m³ and the plane of the bar is rotated to be perpendicular to the direction of B. If a current of 8.00 A in the conductor results in a Hall voltage of 5.80 x 1012 v, what is the magnitude of the Earth's magnetic field at this location? 0.0431 Your response is off by a multiple of ten. µTarrow_forwardTrue or False A moving charge entering a magnetic field parallel to the field will move in a straight line. A man whose resistance is 10,000 Ω has 120 volt potential difference across his body. This would cause a fatal shock. Adding resistors to a parallel circuit decreases the equivalent resistance. The resistance of a resistor increases with decreased temperature The terminal voltage (V) of a battery is always less than its EMF (ξ). The electric field E is a scalar but the electric potential V is a vector.arrow_forwardIn an experiment designed to measure the Earth's magnetic field using the Hall effect, a copper bar 0.400 cm thick is positioned along an east- west direction. Assume n = 8.46 × 1028 electrons/m3 and the plane of the bar is rotated to be perpendicular to the direction of B. If a current of 8.00 A in the conductor results in a Hall voltage of 4.20 x 10¯12 v, what is the magnitude of the Earth's magnetic field at this location? µTarrow_forward
- The artery in the figure has an inside diameter of 2.75 mm and passes through a region where the magnetic field is 0.067 T. If the voltage difference between the electrodes is 186 μV , what is the speed of the blood? Express your answer using two significant figures.arrow_forwardIf a magnetic field B = (4.70î + 4.45ĵ) × 10-2 T passes through the area A = (4.00 × 10¬1 m2)î, determine the magnetic flux through this area. Wbarrow_forwardMagnetic fields within a sunspot can be as strong as 0.4 T. (By comparison, the earth’s magnetic field is about 1/10,000 as strong.) Sunspots can be as large as 25,000 km in radius. The material in a sunspot has a density of about 3 x 10-4 kg/m3 . Assume m for the sunspot material is µ0. If 100% of the magneticfield energy stored in a sunspot could be used to eject the sunspot’s material away from the sun’s surface, at what speed would that material be ejected? Compare to the sun’s escape speed, which is about 6 x 105 m/s.arrow_forward
- Principles of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningGlencoe Physics: Principles and Problems, Student...PhysicsISBN:9780078807213Author:Paul W. ZitzewitzPublisher:Glencoe/McGraw-Hill
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