Lightning Questions

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Very Short Answers Questions [1 Mark Questions]

Ques. A single bolt of lightning might be several miles long and contain how many electrons?

1. 156 billion
2. 156 quintillion
3. 156 million
4. None of the above

Ans. The correct answer is b. 156 quintillion

Explanation: A single bolt of lightning may be several miles long and produce a strong electrical discharge. In an electrical circuit, electrons are negatively charged particles that transport current. Given the size and power of a lightning bolt, it is logical to believe that it includes a large number of electrons. therefore, the right answer is 156 quintillion, which is an extremely large number of electrons.

Ques. Lightning helps restore the natural electrical balance in the clouds.

1. True
2. False

Ans. The correct answer is a. True

Explanation: By transferring electrical charges between the earth and the clouds, lightning helps restore the natural electrical equilibrium in the clouds. During a thunderstorm, the electrical charges that have accumulated in the clouds are released by lightning bolts, which move from the negatively charged bottom of the cloud to the positively charged earth. This mechanism helps in the restoration of a more stable condition by balancing the electrical imbalances in the environment.

Ques. Where is the best place to be during a thunderstorm?

1. Inside a car
2. Under a tree
3. Inside a building
4. Inside a car or building

Ans. The correct answer is d. Inside a car or building

Explanation: It is dangerous to be outside during a thunderstorm because lightning can hit objects such as trees. Being inside a car or a building gives lightning protection because it operates as a Faraday cage, diverting the electric charge around the occupants and into the earth.

Ques. This type of lightning is the most dangerous.

1. When a negative electrical charge builds up on the ground it makes the electrons in the thundercloud discharge into the earth.
2. When a neutral electrical charge builds up on the ground it makes the electrons in the thundercloud discharge into the sun.
3. When a positive electrical charge builds up on the ground it makes the electrons in the thundercloud discharge into the earth.
4. None of the above

Ans. The correct answer is c. When a positive electrical charge builds up on the ground it makes the electrons in the thundercloud discharge into the earth.

Explanation: When a positive electrical charge accumulates on the ground, it interferes with the negative charge in the thundercloud. This imbalance attracts electrons in the thundercloud to the positively charged ground, resulting in a lightning discharge from the cloud to the earth. This is the most dangerous type of lightning since it contains a large amount of energy and might cause major harm.

Ques. Lightning never strikes the same place twice.

1. True
2. False

Ans. The correct answer is b. False

Explanation: Lightning may strike the same location several times. Lightning frequently strikes tall buildings, trees, and other high structures. Furthermore, lightning might hit the same region during a thunderstorm because the electrical charge may be attracted to the same location due to factors such as topography or ground conductivity.

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Short Answers Questions [2 Marks Questions]

Ques. What is lightning?

Ans. Lightning is a huge electric spark that occurs in the sky between clouds, the ground, and the air. Air acts as an insulator between negative and positive charges in the cloud, as well as between the ground and the cloud, during the early phases of formation.

Ques. Why does lightning always come before thunder?

Ans. We can sometimes see lightning before we can hear thunder. This is due to the sufficiently large distance between the clouds and the surface. We know that light travels at faster speeds than sound. As a result, there is a time-based delay between observing lightning and hearing thunder.

Ques. Why is it not safe to go out with an umbrella when there is heavy rain, lightning, or thunder?

Ans. Lightning often comes along with thunder or heavy rainfall. Lightning is defined as the discharge of a huge amount of electric charges that have gathered in the clouds towards the ground. These electric charges can be passed to the person carrying an umbrella through the umbrella's metallic rod. As a result, the person may suffer from severe electric shock and may even die. When there is heavy rain, lightning, or thunder, it is not advised to walk outside with an umbrella.

Ques. What is ball lightning?

Ans. Ball lightning, sometimes known as globe lightning, is an uncommon aerial phenomenon that takes the appearance of a luminous sphere several centimeters in diameter. It is most common near the ground during thunderstorms, in addition to cloud-to-ground lightning. It can be red, orange, yellow, white, or blue in hue and has a distinct odor and hissing sound.

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Long Answers Questions [3 Marks Questions]

Ques. Explain the characteristics of lightning.

Ans. Lightning is a naturally occurring electrostatic discharge in which two electrically activated zones, one on the ground and one in the atmosphere, temporarily neutralize each other, resulting in an instantaneous discharge of one energy gigajoule. 

• This release might result in a wide range of electromagnetic radiation, ranging from heat energy produced by electron mobility to bright flashes of visible light as black body radiation. 
• Thunder is a sound produced by lightning that emerges as gases in the discharge experience a rapid increase in pressure. 
• Lightning often occurs during thunderstorms and other high-voltage weather occurrences. During volcanic eruptions, volcanic lightning can also occur.

Ques. What safety measures must be followed during a thunderstorm and lightning?

Ans. The following are the safety measures or precautions that must be taken to keep from lightning and thunderstorms:

• Avoid open areas since they are unsafe. Look for houses or structures to take shelter in. It is safest to stay inside vehicles with closed windows and doors when traveling by bus or automobile.
• Tractors, motorcycles, construction machines, and open areas such as fields, parks, and tall trees should be avoided since they are unsafe.
• If one is outside and there is no cover available, one should avoid any large trees, poles, and other metallic objects.
• Avoid coming into contact with telephone cables, metal pipes, and wires.

Ques. How do electric discharges occur?

Ans. Electrostatic discharge generally occurs when two particular conditions are satisfied. 

• The first thing is that there should be a sufficiently high potential difference between the two space areas. 
• Second, a medium with a high resistance must prevent the opposing charges from equilibrating freely. 
• The atmosphere acts as an electrical barrier or insulation, preventing free electrical equalization between charged areas with opposing polarities. 
• During a thunderstorm, there is usually charge buildup and separation in certain parts of the cloud. 
• The exact processes by which this occurs are currently not clear.

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Very Long Answers Questions [5 Marks Questions]

Ques. Explain what happens when a thundercloud passes near the Earth’s surface.

Ans. When a thundercloud passes over the surface of the Earth, it induces an equivalent charge with opposite polarity on the surface under the cloud. 

• As the thundercloud approaches, the created positive surface charge will decrease at a given position. 
• It will rise as the storm's center approaches and fall as the thunderclouds move. 
• A bell curve can be used to approximate the value of the induced surface charge. 
• The oppositely charged locations generate an electric field inside the air that separates them. 
• The intensity of the surface charge on the thundercloud's base affects the electric field. 
• The accumulated charge increases if the electric field increases.

Ques. What are the main types of lightning?

Ans. There are four main types of lightning. These are

• Cloud-to-cloud Lightning (CC): Cloud-to-cloud lightning refers to the discharge between clouds, i.e. from one cloud to another. This lightning never reaches the earth.
• Cloud-to-ground Lightning (CG): Cloud-to-ground lightning is caused by the discharge between the clouds and the earth. This type of lightning is extremely harmful and dangerous since it strikes the ground, putting property and people at risk.
• Ground-to-cloud Lightning (GC): It is also known as upward-moving lightning. Ground-to-cloud lightning is common on skyscrapers and towering buildings. This lightning can have either a positive or negative polarity.
• Intracloud Lightning (IC): It is a usual type of lightning in clouds that contains both positive and negative charges. This lightning occurs within the cloud, as the name implies.

Ques. Explain the process of lightning. How does it strike? 

Ans. Lightning is a type of electric spark that occurs on a large scale. 

• It is caused by a concentration of charges, both positive and negative, within the clouds. 
• When two clouds with opposing charges come into close contact, the charges in them move from one cloud to the other through the air that exists between them. 
• A bright spark appears as a result of the transfer of these charges. 
• This bright spark is referred to as lightning. It can happen when electric charges move or flow from one region of the cloud to another or from the cloud to the earth.

High temperatures and a large amount of electric charge are also associated with lightning. Heat is created in a large amount, causing sudden expansion of air, which causes vibration, which results in the sound of thunder.

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