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Chapter 23: Q23.8-17CQ (page 858)

Does plastic insulation on live/hot wires prevent shock hazards, thermal hazards, or both?

Short Answer

Expert verified

Plastic is non conducting for both heat and electricity, meaning it prevents both shock and thermal hazards.

Step by step solution

01

Definition of shock hazards and thermal hazards

A possible electric shock to a person, which can be created by a variety of events, is known as a shock hazard. When a person comes into contact with a voltage difference, it causes shock.

A thermal hazard is defined as an article that, in regular use or when subjected to reasonably anticipated damage or abuse, presents an unreasonable risk of personal injury or disease due to heat, such as from hot parts, substances, or surfaces, due to its design or manufacture.

02

Explanation

Plastic is a perfect insulator of heat and electricity, which means it protects against both shock and thermal hazards.

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Most popular questions from this chapter

Verify that after a time of \(10.0{\rm{ }}ms\), the current for the situation considered in Example \(23.9\) will be \(0.183{\rm{ }}A\) as stated.

An\({\rm{emf}}\)is induced by rotating a\({\rm{1000 - }}\)turn,\({\rm{20}}{\rm{.0 cm}}\)diameter coil in the Earth’s\({\rm{5}}{\rm{.00 \times 1}}{{\rm{0}}^{{\rm{ - 5}}}}{\rm{ T}}\)magnetic field. What average\({\rm{emf}}\)is induced, given the plane of the coil is originally perpendicular to the Earth’s field and is rotated to be parallel to the field in\({\rm{10}}{\rm{.0 ms}}\)?

At what angular velocity in rpm will the peak voltage of a generator be \(480V\), if its \(500\)-turn, \(8.00cm\) diameter coil rotates in a \(0.250T\) field?

Two coils are placed close together in a physics lab to demonstrate Faraday’s law of induction. A current of in one is switched off in , inducing an emf in the other. What is their mutual inductance?

An RC circuit consists of a\(40.0{\rm{ }}\Omega \)resistor and a\(5.00{\rm{ }}\mu F\)capacitor.

(a) Find its impedance at\(60.0{\rm{ }}Hz\)and\(10.0{\rm{ }}kHz\).

(b) Compare these values of\(Z\)with those found in Example\(23.12\), in which there was also an inductor.
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