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Field Technician Class 9 Quiz
40 Questions
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Field Technician Class 9 Quiz

Created by
@ReliableVibraphone

Questions and Answers

What is the significance of understanding electricity in relation to electrical appliances?

  • It helps in recognizing hazardous situations. (correct)
  • It guarantees the appliances will work efficiently.
  • It makes electrical devices visible.
  • It eliminates the need for maintenance.

    • Which type of electricity is primarily discussed in the chapter?

  • Renewable electricity
  • Static electricity
  • Current electricity (correct)
  • Alternating current

    • What is one of the effects of a power supply breakdown in a city?

  • Diminished risk of accidents.
  • Disruption of essential services. (correct)
  • Launch of emergency backup systems.
  • Increased outdoor activities.

    • Why is it important to learn the theory of electricity?

    <p>To be cautious about potential hazards.</p> Signup and view all the answers

    Which appliance has seen a shift towards electric operation in recent times?

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

    What characteristic of electricity makes it particularly hazardous?

    <p>It is invisible and inaudible.</p> Signup and view all the answers

    What aspect of modern society heavily relies on electricity?

    <p>Digital communication</p> Signup and view all the answers

    What is one reason hospitals must have a reliable power supply?

    <p>To power critical medical equipment.</p> Signup and view all the answers

    Which of the following materials is considered a good insulator?

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

    Static electricity can best be described as:

    <p>A separation of positive and negative charges.</p> Signup and view all the answers

    What is the main characteristic of dynamic or current electricity?

    <p>It flows through conductors.</p> Signup and view all the answers

    Which electrical quantities are considered the basic building blocks of electric circuits?

    <p>Current, voltage, and resistance</p> Signup and view all the answers

    Which example illustrates the concept of static electricity?

    <p>Energy stored in a battery</p> Signup and view all the answers

    Dynamic electricity is characterized by the:

    <p>Movement of charged particles.</p> Signup and view all the answers

    Which of the following statements is NOT true about electricity?

    <p>Current electricity can be easily stored.</p> Signup and view all the answers

    Why is dynamic electricity unable to be stored?

    <p>It flows continuously through conductors.</p> Signup and view all the answers

    What is the measure of electric charge proportional to the number of electrons in an imbalanced state?

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

    Which of the following materials is considered a good conductor of electricity?

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

    What is the theoretical number of electrons moving in a current of 1 ampere in one second?

    <p>$6x10^{18}$</p> Signup and view all the answers

    What happens to electrons in a conductor when an external power source is attached?

    <p>They move in an organized direction.</p> Signup and view all the answers

    Which statement correctly describes insulators?

    <p>They hold electrons tightly and resist movement.</p> Signup and view all the answers

    Who discovered the concept of the coulomb as a unit of electric charge?

    <p>Charles-Augustine de Coulomb</p> Signup and view all the answers

    Which of the following best describes the relationship between electric charges?

    <p>Opposite charges attract and like charges repel.</p> Signup and view all the answers

    What is the symbol for electric charge quantity?

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

    What happens to energy according to the law of conservation of energy?

    <p>It can change its form.</p> Signup and view all the answers

    Which of the following forms of energy can be transformed into electrical energy?

    <p>All of the above</p> Signup and view all the answers

    What are atoms primarily composed of?

    <p>Protons, electrons, and neutrons</p> Signup and view all the answers

    What charge do neutrons carry?

    <p>Neutral charge</p> Signup and view all the answers

    How do electrons behave in relation to the nucleus of an atom?

    <p>They move in an orbit around the nucleus.</p> Signup and view all the answers

    Which statement about protons and electrons is correct?

    <p>The positive charge of protons is equal to the negative charge of electrons.</p> Signup and view all the answers

    Which of the following statements is true about energy transformation into electrical energy?

    <p>All forms of energy can be converted to electrical energy.</p> Signup and view all the answers

    What is the significance of atoms in the universe?

    <p>They are the basic building blocks of everything in the universe.</p> Signup and view all the answers

    What is the SI unit of electrical resistance?

    <p>Ohm (Ω)</p> Signup and view all the answers

    Which statement correctly describes the electrons in insulators?

    <p>Electrons are tightly bound to their atoms.</p> Signup and view all the answers

    How is electrical power commonly defined?

    <p>The rate of doing work in one second.</p> Signup and view all the answers

    Which equation represents electric power in terms of voltage and current?

    <p>P = IV</p> Signup and view all the answers

    What unit is equivalent to one kilowatt?

    <p>1000 watts</p> Signup and view all the answers

    What happens to electrons in conductors when a small voltage is applied?

    <p>They move very easily and freely.</p> Signup and view all the answers

    Which of the following correctly states the relationship between power, voltage, and current?

    <p>P = IV</p> Signup and view all the answers

    What does a high resistance in an insulator imply?

    <p>It requires a high voltage to move electrons.</p> Signup and view all the answers

    Study Notes

    Job Role and Sector

    • Field Technician for Home Appliances within the Electronics and Hardware sector.
    • Class 9 textbook designated for students pursuing this role.

    Chapters Overview

    • Chapter 1: Basics of Electrical and Electronics (Pages 9-56)
    • Chapter 2: Electrical and Electronic Components (Pages 57-93)
    • Chapter 3: Tools and Equipment (Pages 94-118)
    • Chapter 4: Installing an RO Water Purifier (Pages 119-185)
    • Chapter 5: Repair and Maintenance of Water Purifier (Pages 186-225)
    • Chapter 6: Maintain Health and Safety (Pages 226-243)

    Basics of Electrical and Electronics

    • Electricity is crucial in modern society; it powers various appliances including electric cars.
    • Current electricity is essential for the function of hospitals, schools, and businesses during power outages.
    • Understanding electricity is vital for safety and troubleshooting electronic appliances.

    Energy Transformation

    • Energy cannot be created or destroyed, only transformed (Law of Conservation of Energy).
    • Various forms of energy can be converted to electrical energy:
      • Nuclear, Chemical, Hydel, Thermal, Solar, Wind.
    • Example: Hydel power plants convert hydel energy to electricity.

    Energy Foundations

    • All matter, including humans and stars, is composed of atoms.
    • Atoms consist of subatomic particles: protons (+), electrons (-), and neutrons (neutral).
    • Electric charge is a property of subatomic particles. Opposite charges attract, while like charges repel.

    Electric Charge

    • Measured in coulombs; one coulomb equals the charge of approximately 6.24 x 10^18 electrons.
    • Electric current occurs when free electrons flow in one direction due to an external power source, quantified in amperes.

    Conductors and Insulators

    • Conductors: Materials like copper and aluminum allow easy movement of electrons.
    • Insulators: Materials such as rubber and plastic restrict electron movement.

    Types of Electricity

    • Static Electricity: Charge separation occurs without movement (e.g., energy stored in batteries).
    • Dynamic/Current Electricity: Flows through wires and transmits energy to devices; cannot be stored without conversion.

    Electrical Quantities

    • Electrical circuits are based on three main quantities: current, voltage, and resistance.
    • Resistance (R): Represents opposition to current flow, measured in ohms (Ω).
    • Electric Power (P): The rate of energy transfer, measured in watts (W), with formulas:
      • P = V x I (where V = voltage, I = current).
      • 1 Watt = 1 Joule/second; 1 Kilowatt = 1000 watts.

    Key Concepts in Power Generation

    • Various power plants contribute to electricity generation through different energy sources.
    • Understanding electricity sources and their capacities is fundamental in the field.

    Applications and Assignments

    • Discuss sources of electricity, including renewable vs non-renewable types.
    • Prepare a data sheet detailing capacities of hydel power plants.
    • List the top five thermal power plants in India by generation capacity.

    Studying That Suits You

    Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

    Quiz Team

    Description

    This quiz is designed for students studying to become field technicians in the home appliances sector. It covers essential concepts and skills outlined in the Class 9 student textbook. Test your knowledge and understanding of electronics and hardware relevant to this role.

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