Embibe Experts Solutions for Chapter: Some Natural Phenomena, Exercise 1: Exercise

Aircraft have wire static dischargers on their trailing wing tips so that the electrical charge that builds up in the plane as it travels can be safely and continuously discharged into the air. Without the dischargers, this static charge could damage sensitive computer instrument onboard. These dischargers are visible as tiny hair-like extensions on this jet's wing.

Which is the most likely cause of static charge build-up on aircraft?

Rahul has struck by a lightning and he survived. He said that just before he was struck, he felt a tingling sensation in his body and the hairs on his body and head stood up.

Which phenomenon is the most likely cause of this pre-strike occurrence?

When you rub a rubber balloon against your hair and then place it near to but not touching a neutrally charged wall, what happens to the surface of the wall?

In the following diagram, amber and fur are rubbed together resulting in a negatively charged amber and positively charged fur.

During the process of charging the fur, 

Aarav and family were on a road trip. They stopped by a roadside eatery for lunch. While waiting for the food, Aarav was playing with the utensils. When he rubbed a plastic spoon on his woollen jumper and held above a mixture of salt and pepper, pepper jumps to the spoon. Choose the best reason for this:

An electrostatic precipitator is a filterless device that removes polluted particles using the principle of charge attraction and repulsion. Negatively charged polluted gas enters an electrostatic precipitator as shown in this diagram. 

Which of the following situations is most likely to result in clean gas exiting the precipitator? 

This high voltage tower has a lightning rod and grounding wire to protect it from damaging lightning strikes. How does a lightning rod work? 

Use the following Triboelectric Series table to answer this question. 

Stroking this cat with which material will negatively charge its fur?