Physics Teacher's Guide - Grade 10
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Questions and Answers

Who is responsible for designing the book mentioned in the guide?

  • Fikadu Eshetu
  • Moges Tsega
  • Derese Tekestebrihan (correct)
  • Samuel Assefa
  • Which organization did not support the General Education Quality Improvement Program?

  • United Nations Children’s Fund
  • World Bank
  • Global Partnership for Education
  • International Monetary Fund (correct)
  • What is the primary aim of the guide published by the Ministry of Education?

  • To outline the curriculum for Grade 10
  • To present scientific research findings
  • To serve as a resource for teachers (correct)
  • To provide entertainment for students
  • Which contributor holds a Ph.D. in their field?

    <p>Samuel Assefa</p> Signup and view all the answers

    In which year was the guide first published?

    <p>2022</p> Signup and view all the answers

    What is one of the main funding sources for the guide's publication?

    <p>Danish Ministry of Foreign Affairs</p> Signup and view all the answers

    Who contributed as an Illustrator for the guide?

    <p>Umer Nuri</p> Signup and view all the answers

    Which role did Moges Tsega fulfill for the guide?

    <p>Content Editor</p> Signup and view all the answers

    What is the definition of Coulomb’s Law of Electrostatics?

    <p>It states that electric forces decrease with increasing distance between charges.</p> Signup and view all the answers

    Which instrument is used to measure electric current in a circuit?

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

    What does an electric circuit consist of?

    <p>A closed loop through which electric current flows.</p> Signup and view all the answers

    What is one key characteristic of magnetic fields created by current-carrying conductors?

    <p>They surround the conductor and are perpendicular to the current flow.</p> Signup and view all the answers

    What principle explains the behavior of light as it passes through different media?

    <p>Law of Reflection and Refraction</p> Signup and view all the answers

    What is the relationship between voltage, current, and resistance in an electrical circuit?

    <p>Current is equal to voltage divided by resistance.</p> Signup and view all the answers

    Which of the following describes the function of an electroscope?

    <p>It detects the presence of electric charge.</p> Signup and view all the answers

    In what way does the Earth's magnetic field interact with compasses?

    <p>It aligns the compass needle with the magnetic poles.</p> Signup and view all the answers

    What is the first step in the graphical method of vector addition?

    <p>Place the vectors head to tail.</p> Signup and view all the answers

    In the triangle law of vector addition, the two vectors form which part of the triangle?

    <p>The sides of the triangle.</p> Signup and view all the answers

    How is the resultant vector expressed when its magnitude is 50.0 m and direction is 7.0° south of east?

    <p>R = 50.0 m, θ = 7.0° south of east.</p> Signup and view all the answers

    What geometrical method helps find the resultant vector when several vectors are added together?

    <p>The polygon method.</p> Signup and view all the answers

    What is the result when vectors are joined head to tail and the tail of the first vector is joined with the head of the last vector, resulting in zero magnitude?

    <p>The resultant vector is zero.</p> Signup and view all the answers

    What tool is required to measure the direction of the resultant vector?

    <p>A protractor.</p> Signup and view all the answers

    In the parallelogram law of vector addition, what represents the resultant vector?

    <p>The diagonal of the parallelogram.</p> Signup and view all the answers

    Which method requires measuring both magnitude and angles to find a resultant vector accurately?

    <p>Graphical method.</p> Signup and view all the answers

    What is the magnitude of the resultant displacement when given $294.3$ km and $69.3$ km?

    <p>302 km</p> Signup and view all the answers

    What direction does the resultant displacement make in relation to north when it is $13^ ext{◦}$ south of west?

    <p>South-west</p> Signup and view all the answers

    Calculate the magnitude of velocity $V$ given $V_x = 9.80$ units and $V_y = -6.40$ units.

    <p>11.70 units</p> Signup and view all the answers

    What is the direction angle $ heta$ for the velocity vector given $V_x = 9.80$ and $V_y = -6.40$?

    <p>-33.10°</p> Signup and view all the answers

    If vector $ extbf{A}$ is $21 ext{ cm}$ north and vector $ extbf{C}$ is $26 ext{ cm}$ south, what is the resultant vector $ extbf{A} - extbf{C}$?

    <p>5 cm south</p> Signup and view all the answers

    What is the magnitude of the resultant vector $ extbf{R}$ when the vectors involved are $-5 ext{ cm}$ north and $16 ext{ cm}$ east?

    <p>17 cm</p> Signup and view all the answers

    What direction does the resultant vector $ extbf{R}$ make if it has components $-5 ext{ cm}$ and $16 ext{ cm}$?

    <p>17° south of East</p> Signup and view all the answers

    Which of the following statements about the vectors is true?

    <p>Vectors A and C have different magnitudes.</p> Signup and view all the answers

    What is the average velocity of the athlete if the displacement is 20 km and the total time taken is 3 hours?

    <p>20 km/h northeast</p> Signup and view all the answers

    If the eastward displacement is 144 km and the average speed is 48 km/h, how long did the journey take?

    <p>3 hours</p> Signup and view all the answers

    What is the angle of displacement if the northward displacement is 12 km and the eastward displacement is 16 km?

    <p>53 degrees</p> Signup and view all the answers

    What is the resultant displacement magnitude of an athlete with 12 km north and 16 km east?

    <p>20 km</p> Signup and view all the answers

    What would be the average velocity if the athlete completed the run in 4 hours instead of 3 hours?

    <p>20 km/h northeast</p> Signup and view all the answers

    Which formula is used to calculate the angle of displacement given the east and north components?

    <p>θ = tan⁻¹(opposite/adjacent)</p> Signup and view all the answers

    In a scenario where the average speed is lower than the average velocity, what can be inferred about the athlete's path?

    <p>The athlete took a longer route with deviations.</p> Signup and view all the answers

    What distance is covered by the athlete when traveling north and east described as 12 km North and 16 km East?

    <p>20 km</p> Signup and view all the answers

    Study Notes

    Contributors and Editorial Team

    • Contributors include Fikadu Eshetu (Ph.D), Mideksa Kasahun (MSc), Moges Tsega (Ph.D), Samuel Assefa (Ph.D), Felekech G/Egziabher (Ph.D), Umer Nuri (MSc), and Derese Tekestebrihan (Ph.D fellow).
    • Evaluation team consists of Zafu Abraha (MSc), Girmaye Defar (MSc), and Dessie Melese (MSc).

    Publication Details

    • First published in 2022 by the Ethiopian Ministry of Education as part of the General Education Quality Improvement Program for Equity (GEQIP-E).
    • Supported by multiple international organizations including the World Bank, UNICEF, and Global Partnership for Education.

    Key Topics Covered

    • Static and Current Electricity includes topics such as:

      • Nature of charges and methods of charging.
      • Coulomb’s Law, electric field, and circuit basics like Ohm's Law.
      • Importance of voltmeters and ammeters for circuit connection.
    • Magnetism covers:

      • Basics of magnets and magnetic fields.
      • Interaction of magnetic forces with moving charges and current-carrying conductors.
      • Practical applications of magnetic forces and fields.
    • Electromagnetic Waves and Optics detail:

      • Characteristics and spectrum of electromagnetic waves.
      • Properties of light, including reflection, refraction, and interaction with mirrors and lenses.
      • Anatomy of the human eye and use of optical instruments.

    Vector Addition and Subtraction

    • Triangle law and parallelogram law for vector addition are explained.
    • Head-to-tail method and polygon method are tools for visually representing vector sums.
    • Discussion on resultant vectors, their magnitudes, and directions with examples involving graphical representation.

    Average Velocity and Displacement Calculations

    • Average velocity formulation is provided, emphasizing calculations based on displacement.
    • Worked examples on determining resultant displacement from North and East components.

    Teacher’s Assessment Strategy

    • Encouragement of oral questioning to gauge student understanding.
    • Summative activities recommended to reinforce key concepts on vector addition methods.

    Additional Notes

    • Emphasis on understanding electrical safety and ethical use of electricity.
    • Projects related to electricity and magnetism foster hands-on learning experiences for students.

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    Description

    This guide provides educators with essential resources and teaching strategies for teaching physics to Grade 10 students. It covers various physics topics, methodologies, and insights specific to the curriculum of the Federal Democratic Republic of Ethiopia.

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