Physics Chapter on Electricity and Charges
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Questions and Answers

What is primarily responsible for the occurrence of thunder after lightning?

  • The movement of tectonic plates
  • The rapid expansion of air (correct)
  • The vibration of clouds
  • The cooling of air

    • What charge does a glass rod acquire when rubbed with silk cloth?

  • Negative charge
  • Induced charge
  • Positive charge (correct)
  • Neutral charge

    • What process can be used to charge an object effectively?

  • Rubbing the object against a material (correct)
  • Heating the object to a high temperature
  • Conducting through a liquid medium
  • Submerging the object in a saltwater solution

    • Which process involves charging an object without direct contact?

    <p>Induction</p> Signup and view all the answers

    What is the purpose of constructing a simple electroscope?

    <p>To visually demonstrate the transfer of electric charges</p> Signup and view all the answers

    When two like charges come into proximity, what is the expected interaction?

    <p>Repulsion</p> Signup and view all the answers

    Which of the following safety measures should be taken during an earthquake?

    <p>Stand under a doorway</p> Signup and view all the answers

    What occurs when an ebonite rod, rubbed with fur, is brought near a suspended glass rod?

    <p>The glass rod is attracted</p> Signup and view all the answers

    Which natural phenomenon is primarily influenced by climate conditions?

    <p>Hurricanes</p> Signup and view all the answers

    Which method is NOT mentioned as a way to charge a body?

    <p>Static electricity buildup</p> Signup and view all the answers

    What conclusion can be drawn about the interaction between two objects with like charges?

    <p>They repel each other.</p> Signup and view all the answers

    What was the primary discovery made by Charles Du Fay regarding electric charges?

    <p>Two distinct types of electric charges were identified.</p> Signup and view all the answers

    In Benjamin Franklin's kite experiment, what was the key role of the key tied to the kite string?

    <p>To act as a conductor of electricity.</p> Signup and view all the answers

    What occurs when two different materials are rubbed together in terms of electrical charges?

    <p>They acquire opposite charges.</p> Signup and view all the answers

    Which of the following observations aligns with the concept of unlike charges attracting each other?

    <p>A glass rod and an ebonite rod attract each other.</p> Signup and view all the answers

    Which object is likely to become charged when rubbed with dry hair?

    <p>Ebonite rod</p> Signup and view all the answers

    What is the primary reason the water stream bends towards the charged comb during the induction experiment?

    <p>The attraction between the charges on the comb and the water stream.</p> Signup and view all the answers

    Which of the following best describes charging by conduction?

    <p>A charged object transfers its charge to an uncharged object through contact.</p> Signup and view all the answers

    When an electroscope's brass disc is touched with a grounded object, what happens to the gold leaves?

    <p>The leaves collapse.</p> Signup and view all the answers

    If a glass rod is rubbed with silk, it is expected to become:

    <p>Charged positively</p> Signup and view all the answers

    Which of the following materials, when rubbed with a plastic scale, is most likely to render it charged?

    <p>Silk cloth</p> Signup and view all the answers

    What effect does rubbing a balloon with a sweater have on the balloon?

    <p>It becomes charged and attracts light objects.</p> Signup and view all the answers

    What term describes the process of charge transfer from a body to the earth?

    <p>Earthing</p> Signup and view all the answers

    Which of the following best defines a fault in geological terms?

    <p>A crack in tectonic plates caused by their movement.</p> Signup and view all the answers

    What device is specifically used to measure seismic waves and their intensity?

    <p>Seismograph</p> Signup and view all the answers

    Which statement is true about the purpose of a lightning conductor?

    <p>It directs lightning strikes safely into the ground.</p> Signup and view all the answers

    Which of the following statements most accurately describes the phenomenon of thunder?

    <p>Thunder results from the sudden expansion of air due to lightning.</p> Signup and view all the answers

    What term describes the point on the Earth's surface directly above the origin of an earthquake?

    <p>Epicentre</p> Signup and view all the answers

    What is a consequence of the magnitude of an earthquake?

    <p>The distance from the epicenter.</p> Signup and view all the answers

    Which of the following is NOT a potential cause of earthquakes?

    <p>Heavy rainfall.</p> Signup and view all the answers

    What should be prioritized in building designs for earthquake-prone areas?

    <p>Having roofs that are lightweight.</p> Signup and view all the answers

    Which statement about a seismograph is true?

    <p>It records the vibrations caused by earthquakes.</p> Signup and view all the answers

    What is a recommended personal safety action during an earthquake?

    <p>Take shelter under sturdy furniture.</p> Signup and view all the answers

    Which structural failure is MOST likely during an earthquake?

    <p>Collapsing roofs.</p> Signup and view all the answers

    What kind of damage can tsunamis caused by underwater earthquakes result in?

    <p>High sea waves causing coastal flooding.</p> Signup and view all the answers

    Which preventive measure against earthquakes is least effective?

    <p>Using heavy furniture to stabilize areas.</p> Signup and view all the answers

    What happens when a glass rod is rubbed with silk cloth?

    <p>The glass rod becomes positively charged.</p> Signup and view all the answers

    What occurs during the charging by contact method?

    <p>Charge is transferred from a charged body to an uncharged body.</p> Signup and view all the answers

    What is the role of earthing in charge transfer?

    <p>It neutralizes the charged body by transferring charges to the earth.</p> Signup and view all the answers

    What immediate effect is observed when a charged glass rod is brought near the brass disc of a gold leaf electroscope?

    <p>The gold leaves diverge due to similar charges.</p> Signup and view all the answers

    How does touching the brass disc of the electroscope with your hand affect the gold leaves?

    <p>It neutralizes the charge, causing the leaves to collapse.</p> Signup and view all the answers

    What is the primary reason why it is not safe to stand under a tree during a lightning storm?

    <p>Trees can act as a lightning conductor, channeling electricity to the ground.</p> Signup and view all the answers

    Which element is NOT primarily found in the Earth's mantle?

    <p>Silicon</p> Signup and view all the answers

    What is seismograph primarily used to detect?

    <p>Intensity of seismic waves</p> Signup and view all the answers

    What is the role of a lightning conductor on tall buildings?

    <p>It channels electrical discharges safely into the ground.</p> Signup and view all the answers

    Which characteristic distinguishes the Earth's crust from the mantle?

    <p>The crust is solid and varies in thickness.</p> Signup and view all the answers

    Which factor is least likely to affect the damaging effects of an earthquake?

    <p>Type of vegetation in the area</p> Signup and view all the answers

    During a lightning storm, which action is considered safe?

    <p>Staying in a car with a metal roof.</p> Signup and view all the answers

    Which of the following safety practices is NOT recommended during an earthquake?

    <p>Use elevators to exit buildings</p> Signup and view all the answers

    Which term refers to the point on the Earth's surface that is directly above the origin of an earthquake?

    <p>Epicenter</p> Signup and view all the answers

    What crucial feature should buildings have to minimize earthquake damage?

    <p>Lightweight design</p> Signup and view all the answers

    What happens when two oppositely charged clouds come near each other during a thunderstorm?

    <p>They allow the flow of electric discharge through moist air.</p> Signup and view all the answers

    What role does a lightning conductor play when lightning strikes a building?

    <p>It provides a conductive pathway for the charge to flow to the earth.</p> Signup and view all the answers

    What is the primary reason for not standing under a tree during a thunderstorm?

    <p>Trees can attract lightning which may cause injury or death.</p> Signup and view all the answers

    What is the composition of a lightning conductor?

    <p>A metal rod with spikes and a copper plate embedded in the ground.</p> Signup and view all the answers

    What effect does lightning have on its surrounding air?

    <p>It causes a sudden expansion of the air due to heating.</p> Signup and view all the answers

    What should be avoided if one finds themselves in an open space during a thunderstorm?

    <p>Touching the ground with both feet.</p> Signup and view all the answers

    What does the negative charge on a cloud induce in its nearby environment?

    <p>A positive charge in the ground beneath.</p> Signup and view all the answers

    What safety measure is recommended to ensure safety during a thunderstorm?

    <p>Taking shelter inside a closed building.</p> Signup and view all the answers

    Which of the following describes an earthquake?

    <p>The sudden shaking of the earth caused by tectonic movement.</p> Signup and view all the answers

    What occurs when a charged cloud passes over a tall building?

    <p>An opposite charge is induced on the building.</p> Signup and view all the answers

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