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Chapter 18: Q24CQ (page 662)

Discuss pros and cons of a lightning rod being grounded versus simply being attached to a building.

Short Answer

Expert verified

When the lightning rod is grounded, it gets discharged at a quicker rate as compared to the rod which is simply attached to the building. So, if the lightning strikes the building with a grounded lightning rod, the excess charge passes to the ground and the building will survive an immense strike.

Step by step solution

01

Lightning rod

A lightning rod is made of conducting metal and installed on the top of the building which protects the building from lightning damage by guiding the excess charge to the ground.

02

Grounded vs ungrounded lightning rod

When a lightning rod is connected to the ground, the excess charge on the rod quickly flows to the ground, and hence the rod discharges at a quicker rate when compared to the rod which is simply attached to the building.

In event, if that lightning strikes the building, an ungrounded rod would not be able to discharge quickly and hence the building might get damaged. Instead, if the rod is grounded, the charges flow to the ground quickly, preventing damage to the building.

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Most popular questions from this chapter

Consider two insulating balls with evenly distributed equal and opposite charges on their surfaces, held with a certain distance between the centers of the balls. Construct a problem in which you calculate the electric field (magnitude and direction) due to the balls at various points along a line running through the centers of the balls and extending to infinity on either side. Choose interesting points and comment on the meaning of the field at those points. For example, at what points might the field be just that due to one ball and where does the field become negligibly small? Among the things to be considered are the magnitudes of the charges and the distance between the centers of the balls. Your instructor may wish for you to consider the electric field off axis or for a more complex array of charges, such as those in a water molecule.

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