Earthing and Electrical Safety Quiz
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Questions and Answers

How can you reduce the risk of damage by an electric current?

Earth the object by connecting it to the Earth with a conductor, similar to a lightning conductor.

What is the purpose of earthing fuel pipes in cars and planes?

To reduce the risk of sparks and potential fire by allowing any charge to flow down the wire to the Earth.

How do electronics engineers reduce the risk of damage to delicate electrical components in circuits?

They wear special wristbands connected to a metal wire that goes to the ground, allowing any charge to flow down to Earth rather than through the delicate components.

What causes people to feel small shocks when touching certain objects, such as car doors or door handles?

<p>Friction can cause the objects to become charged, leading to small shocks when touched.</p> Signup and view all the answers

What are the potential dangers of lightning striking a person?

<p>Break bones, cause burns, or kill them</p> Signup and view all the answers

How can electric shocks from lightning affect a person's heart?

<p>Interfere with their heart or even stop their heart beating</p> Signup and view all the answers

What do doctors use an electric current for in hospitals during emergencies?

<p>To try to restart a patient’s heart if it stops beating</p> Signup and view all the answers

How can the use of a lightning conductor help protect buildings during a thunderstorm?

<p>Electrons flow down the strip to the plate, and into the ground, saving the building from being damaged</p> Signup and view all the answers

Why can plastic become charged if you rub it, but not metal?

<p>Plastic can become charged when rubbed because it is an insulator, allowing the charge to build up. Metal, being a conductor, allows the charge to move freely and dissipate.</p> Signup and view all the answers

A student says that the rods repel because they have poles like magnets. Is she correct? Explain your answer.

<p>No, the rods repel due to the buildup of like charges, not because they have poles like magnets. This is an electrostatic phenomenon, not a magnetic one.</p> Signup and view all the answers

How is a spark related to the movement of electric charge through the air?

<p>A spark is formed when enough charge builds up due to friction, causing charge to move through the air. The moving charge creates an electric current, heating up the air and producing light and sound.</p> Signup and view all the answers

Explain how electrostatic phenomena can lead to lightning in thunderclouds.

<p>Inside a thundercloud, the air moves around and forms regions that are positively and negatively charged. When enough negative charge builds up at the bottom of the cloud, it can create a spark that travels to Earth, resulting in lightning.</p> Signup and view all the answers

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