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Chapter 29: Problem 10

People with pacemakers or other mechanical devices as implants are often warned to stay away from large machinery or motors. Why?

Short Answer

Expert verified
Answer: Individuals with pacemakers or other mechanical implants are warned to stay away from large machinery or motors because the strong magnetic fields generated by these devices can interfere with the functioning of their implants. This interference can lead to irregular heart rates or other adverse effects related to the malfunction of the implant. To ensure safety and proper functioning, it is recommended to maintain a distance of at least 2 meters (6 feet) from any equipment that might generate strong magnetic fields.

Step by step solution

01

Understand the function of a pacemaker or implant

A pacemaker is a small electronic device that helps regulate the heart's rhythm when the heart's natural pacemaker is not functioning properly. Other mechanical implants can be used to aid various bodily functions.
02

Learn about magnetic fields

A magnetic field is a region around a magnet or an electric current where magnetic force is experienced. Large machinery, motors, and electrical appliances produce magnetic fields when they are operating. The strength of a magnetic field depends on the size of the current and the distance from the source.
03

Pacemakers and magnetic fields

Pacemakers and other implanted devices are sensitive to strong external magnetic fields. These magnetic fields can interfere with the device's function, affect the settings, or, in some cases, can potentially shut down the device. This can be harmful to the person with the implant, as it may lead to their heart rate becoming irregular or other adverse effects related to the malfunction of the device.
04

Maintaining a safe distance

To ensure the safety and proper functioning of pacemakers and other implants, it's crucial to maintain a safe distance from large machinery or motors that generate strong magnetic fields. Generally, the recommended distance is at least 2 meters (approximately 6 feet) from any equipment that might generate strong magnetic fields. By following these guidelines, individuals with pacemakers and other mechanical devices as implants can minimize the risk of interference with their device and maintain their overall health and safety.

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Most popular questions from this chapter

Which of the following statements regarding self induction is correct? a) Self-induction occurs only when a direct current is flowing through a circuit. b) Self-induction occurs only when an alternating current is flowing through a circuit. c) Self-induction occurs when either a direct current or an alternating current is flowing through a circuit. d) Self-induction occurs when either a direct current or an alternating current is flowing through a circuit as long as the current is varying.

A popular demonstration of eddy currents involves dropping a magnet down a long metal tube and a long glass or plastic tube. As the magnet falls through a tube, there is changing flux as the magnet falls toward or away from each part of the tube. a) Which tube has the larger voltage induced in it? b) Which tube has the larger eddy currents induced in it?

A rectangular conducting loop with dimensions \(a\) and \(b\) and resistance \(R\), is placed in the \(x y\) -plane. A magnetic field of magnitude \(B\) passes through the loop. The magnetic field is in the positive \(z\) -direction and varies in time according to \(B=B_{0}\left(1+c_{1} t^{3}\right),\) where \(c_{1}\) is a constant with units of \(1 / \mathrm{s}^{3}\) What is the direction of the current induced in the loop, and what is its value at \(t=1 \mathrm{~s}\) (in terms of \(a, b, R, B_{0},\) and \(\left.c_{1}\right) ?\)

An 8 -turn coil has square loops measuring \(0.200 \mathrm{~m}\) along a side and a resistance of \(3.00 \Omega\). It is placed in a magnetic field that makes an angle of \(40.0^{\circ}\) with the plane of each loop. The magnitude of this field varies with time according to \(B=1.50 t^{3}\), where \(t\) is measured in seconds and \(B\) in teslas. What is the induced current in the coil at \(t=2.00 \mathrm{~s} ?\)

An emf of \(20.0 \mathrm{~V}\) is applied to a coil with an inductance of \(40.0 \mathrm{mH}\) and a resistance of \(0.500 \Omega\). a) Determine the energy stored in the magnetic field when the current reaches one fourth of its maximum value. b) How long does it take for the current to reach this value?
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