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5 votes
Small amounts of total penetration usually will not cause a burnout.
a. True
b. False

1 Answer

5 votes

Final answer:

The statement about total penetration causing burnout is false; small amounts can indeed cause burnout. The examples provided highlight other true/false physics principles such as the photoelectric effect, current induction, wire insulation, electric current induction by a magnet, machine efficiency, polarization, and behavior of electric-field lines.

Step-by-step explanation:

The question 'Small amounts of total penetration usually will not cause a burnout.' can be answered as false, as even small amounts of penetration in an electrical context can lead to a breakdown of the insulation and ultimately cause a burnout. When discussing related electromagnetic radiation concepts, it's important to note the following truths:

  • Visible light is not the only type of electromagnetic radiation that can cause the photoelectric effect; ultraviolet light, for instance, can also cause electrons to be expelled from a material.
  • A current is indeed created in a photoconductive cell even if only one electron is expelled from a photon strike.
  • The high-voltage wires that you see atop metal towers are supported by insulators, but they are not entirely wrapped in insulating material.
  • If you drop a bar magnet through a copper tube, it will induce an electric current in the tube due to electromagnetic induction.
  • The efficiency of a simple machine is always less than 100 percent due to inevitable energy loss to friction.
  • Charging an object by polarization can occur without direct contact, contrary to requiring a touch from a charged object.

Furthermore, wood may seem like an insulator, but lightning can indeed travel through a tree to reach the Earth, highlighting the complexity of insulating materials under extreme conditions. Also, electric-field lines from a positive point charge indeed radiate outward.

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