Grade 11 Technical Sciences Paper 1 Exemplary 2017
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Questions and Answers

What is the value of acceleration due to gravity?

  • 9.5 m·s-2
  • 9.8 m·s-2 (correct)
  • 8.9 m·s-2
  • 10 m·s-2

    • The formula for kinetic energy is given by E K = mv.

    False

    What does the symbol 'e' represent in the context of electrical charge?

    -1.6 x 10^-19 C

    The formula for calculating force is ______.

    <p>F = ma</p> Signup and view all the answers

    What is the equation for potential energy due to gravity?

    <p>E p = mgh</p> Signup and view all the answers

    Match the following forces with their corresponding equations:

    <p>Force of gravity = F g = mg Net force = F net = ma Frictional force = f s(max) = μsN Kinetic friction = f k = μkN</p> Signup and view all the answers

    In a series circuit, the total resistance is the sum of individual resistances.

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

    What does 'I' represent in the formula I = Q/Δt?

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

    What is the SI-unit for force?

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

    What does the y-axis on the Cartesian plane represent?

    <p>Vertical component</p> Signup and view all the answers

    The data sheet provided in the examination can be used for all calculations.

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

    What is the maximum number of pages in this question paper?

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

    You are allowed to use a _____ calculator during the examination.

    <p>non-programmable</p> Signup and view all the answers

    Match the following components to their descriptions:

    <p>SI-unit = Standard measurement system Cartesian plane = Two-dimensional coordinate system Force = Push or pull on an object Vector = Quantity having both magnitude and direction</p> Signup and view all the answers

    What is required after showing all formulae in calculations?

    <p>Round off final answers to a minimum of two decimal places</p> Signup and view all the answers

    List one instruction provided to students regarding answer presentation.

    <p>Write neatly and legibly.</p> Signup and view all the answers

    What does equally spaced parallel field lines indicate?

    <p>The electric field is strong and uniform</p> Signup and view all the answers

    The internal resistance of the 6 V battery is considered negligible in the circuit.

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

    What is Ohm's law stated in words?

    <p>The current through a conductor is directly proportional to the voltage across it, provided the temperature remains constant.</p> Signup and view all the answers

    The resistance connected in parallel with the 4 Ω resistor is __.

    <p>2 Ω</p> Signup and view all the answers

    Match the following components to their properties in the circuit:

    <p>4 Ω resistor = In series with the battery 2 Ω resistor = In parallel with the 4 Ω resistor Voltmeter reading = Shows voltage across the resistors Switch S = Controls the flow of current</p> Signup and view all the answers

    If the current in the 8 Ω resistor is 0.6 A, what is the voltage drop across it?

    <p>4.8 V</p> Signup and view all the answers

    The 4 Ω resistor gets warmer than the 6 Ω resistor due to higher resistance.

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

    Why does the voltmeter reading decrease when switch S is closed?

    <p>Current flows through the resistors, causing voltage drop across them.</p> Signup and view all the answers

    What is the longest side of the triangle opposite the right angle called?

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

    Frictional force is a non-contact force.

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

    What type of material will be attracted by a magnet?

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

    When the distance between two charges is halved, the new magnitude of the electrostatic force is ________.

    <p>4F</p> Signup and view all the answers

    Which statement about frictional force is NOT correct?

    <p>It is a non-contact force.</p> Signup and view all the answers

    The charge on plate P in an electric field between oppositely charged plates is negative.

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

    Match the electrostatic force quality with its relation to distance between charges:

    <p>Halved distance = Force increases four times Doubled distance = Force decreases to one-fourth Tripled distance = Force decreases to one-ninth Unchanged distance = Force stays the same</p> Signup and view all the answers

    What will be the electrostatic force between two charges if the distance is halved?

    <p>4F</p> Signup and view all the answers

    What is the length of the ladder if its top rests 4 meters above the ground and the base is 1 meter away from the wall?

    <p>4.24 meters</p> Signup and view all the answers

    Static friction increases as the applied force exceeds the maximum static frictional force.

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

    What is the horizontal component of a 60 N force exerted at a 40-degree angle with the horizontal?

    <p>45.96 N</p> Signup and view all the answers

    The coefficient of static friction ( extit{µs}) for the box is ______.

    <p>0.35</p> Signup and view all the answers

    Match the following forces with their components:

    <p>60 N force = Opposite angle to the horizontal Resultant force = Combined effect of multiple forces Static friction = Force opposing the start of movement Applied force = Force exerted by the learner to push the box</p> Signup and view all the answers

    What is the vertical component of a 60 N force exerted at a 40-degree angle with the horizontal?

    <p>23.09 N</p> Signup and view all the answers

    The maximum static frictional force can be calculated using the equation: $f_{s,max} = \mu_s \cdot N$.

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

    Define frictional force.

    <p>Frictional force is a force that opposes the relative motion of solid surfaces, fluid layers, or material elements sliding against each other.</p> Signup and view all the answers

    Which statement is true regarding the potentials at points 1, 2, 3, and 4?

    <p>A positive charge is at a higher potential at point 2 than at point 3.</p> Signup and view all the answers

    What is the unit of measurement for the rate of flow of charge in a conductor?

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

    The magnitude of the electric field at point P will be E at a distance x from the positive plate of a parallel plate capacitor.

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

    If the electric field at point P is E, what would be the electric field at a distance 2x from the positive plate?

    <p>½E</p> Signup and view all the answers

    Define the term 'resultant'.

    <p>The resultant is the vector that results from adding two or more vectors together.</p> Signup and view all the answers

    Siya walks 6 metres in an easterly direction and then 5 metres north. His total displacement is _____ metres.

    <p>7.81</p> Signup and view all the answers

    Calculate the total vector if two forces, of 100 N and 80 N, are acting on an object at right angles.

    <p>The total vector is approximately 122.47 N.</p> Signup and view all the answers

    Match the following terms with their definitions:

    <p>Ampere = Rate of flow of charge Electric Field = Force per unit charge Coulomb = Unit of charge Volt = Unit of electric potential</p> Signup and view all the answers

    Study Notes

    National Senior Certificate

    • Grade 11 Technical Sciences: Paper 1
    • Examplar 2017

    Instructions and Information

    • Answer all eight questions in the answer book
    • Start each question on a new page
    • Number answers according to the paper's numbering system
    • Leave one line between sub-questions
    • A non-programmable calculator can be used
    • Appropriate mathematical instruments may be used
    • Use the attached data sheet
    • Show all formulae and substitutions in calculations
    • Round final answers to at least two decimal places
    • Give brief motivations, discussions, etc., where needed
    • Write neatly and legibly

    Question 1: Multiple Choice Questions

    • Answer all multiple-choice questions (1.1-1.10) in the answer book.
    • Choose the correct answer (A-D) and mark an X over the corresponding letter.
    • Example:
      • 1.11: A B C D (mark an X over the correct letter)
    • The SI unit for force is the Newton (1.1)
    • The y-axis on a Cartesian plane represents the vertical component (1.2)
    • Vectors are represented by the symbol V (or a bold letter) (1.3)
    • The longest side of a right-angled triangle opposite the right angle is called the hypotenuse (1.4)
    • Frictional force is dependent on the normal force and opposes motion (1.5)
    • A piece of metal is attracted to a magnet (1.6)
    • Halving the distance between two charged spheres quadruples the electrostatic force between them (1.7)
    • Positive charge at a higher potential at point 2 than at point 3 (1.8)
    • The unit of flow of charge is the ampere (1.9)
    • At a distance x from the positive plate of a capacitor, the electric field is E. At a distance -x from the positive plate the electric field will be E (1.10)

    Question 2:

    • 2.1 Define the term resultant.
    • 2.2 Label the parts A, B, and C of the diagram.
    • 2.3 Calculate the total force if two forces of 100N and 80N are exerted on an object.
    • 2.4 Calculate and graphically determine the direction of displacement for a person walking 6 meters east and then 5 meters north.

    Question 3:

    • 3.1 Graphically determine the magnitude and direction of the resultant force using a scale of 1mm = 5N.
    • 3.2.1 Calculate the horizontal component of a 60N force exerted at a 40-degree angle to the horizontal.
    • 3.2.2 Calculate the vertical component of the 60N force exerted at a 40-degree angle to the horizontal.
    • 3.2.3 Graphically show the horizontal and vertical components.

    Question 4:

    • 4.1 Define frictional force.
    • 4.2 Calculate the maximum static frictional force for a 3kg box on a table pushed with 50N force to the right given µs = 0.35.
    • 4.3 Draw a free body diagram for the box indicating all forces
    • 4.4 Calculate the kinetic frictional force given that kinetic friction is 40% of the normal force.

    Question 5:

    • 5.1 Define the term magnetic field.
    • 5.2.1 Identify three mistakes in a learner's diagram of a magnetic field.
    • 5.2.2 Name the device used to determine the magnetic field direction.
    • 5.2.3 Draw a sketch of a broken bar magnet, showing poles.
    • 5.3 Describe why the aurora borealis is visible near the North Pole and how it's formed.
    • 5.4 Compare Earth's magnetic field with a bar magnet's.
    • 5.5 Explain why Earth's magnetic field is important.

    Question 6:

    • 6.1 Sketch the electric field pattern around a +3 × 10⁻⁹ C charged sphere.
    • 6.2 State Coulomb's law in words.
    • 6.3 Calculate the electrostatic force between a +3 × 10⁻⁹ C charged sphere and a -2 × 10⁻⁹ C charged sphere separated by 5 cm.
    • 6.4.1 Define electric field at a point.
    • 6.4.2 Draw the electric field pattern between two oppositely charged particles.
    • 6.4.3 Calculate the net electric field strength at point P due to two charges (X and Y).
    • 6.4.4 Calculate the magnitude and direction of the electrostatic force on an electron if placed at point P.

    Question 7:

    • 7.1 Redraw the diagram of parallel plates and indicate the direction of electric field lines.
    • 7.2 Explain the implications of parallel and equally spaced electric field lines.
    • 7.3 Calculate the electric field between two parallel plates with a 12 V power source and 16 cm separation.

    Question 8:

    • 8.1 State Ohm's law in words.
    • 8.2.1 Calculate the current through the 4Ω resistor.
    • 8.2.2 Calculate the total current in the circuit.
    • 8.2.3 Calculate resistance X.
    • 8.3 Explain why the 4Ω resistor gets warmer than the 6Ω resistor.

    Question 9:

    • 9.1 Why does the voltmeter reading decrease when switch S is closed? (brief explanation)
    • 9.2.1 Calculate the current in the 2Ω resistor.
    • 9.2.2 Calculate the reading on the ammeter.

    Question 10:

    • 10.1 Which value is the dependent variable in the graph?
    • 10.2.1 Locate the point on the graph where Ohm's Law is no longer obeyed.
    • 10.2.2 Describe a possible reason for the deviation from Ohm's Law.
    • 10.3 Calculate the gradient of the obeyed portion of the graph, and use it to calculate the resistance of the conducting wire.

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    Technical Sciences P1 Exemplar GR 11 2017 PDF

    Description

    Test your knowledge with this Grade 11 Technical Sciences Paper 1 from the National Senior Certificate, exemplified for 2017. The quiz consists of multiple-choice questions covering fundamental principles and applications. Make sure to follow the instructions for answering and calculations carefully.

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