Gr 11 Physical Sciences: Ch 7.2 Electric field
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Questions and Answers

What is the definition of an electric field?

  • A region of space where a charge will experience a force. (correct)
  • A region of space where magnetic fields are present.
  • A region of space where electric fields are absent.
  • A region of space where charges are in contact.

    • What is the direction of an electric field at a point in space?

  • The direction of a positive test charge towards the source charge.
  • The direction in which a positive test charge would move if placed at that point. (correct)
  • The direction opposite to the force experienced by a test charge.
  • The direction of a negative test charge towards the source charge.

    • What do electric field lines represent?

  • The strength and direction of the electric field. (correct)
  • The distance between the source charge and the test charge.
  • The force experienced by a negative test charge.
  • The direction of the magnetic field.

    • What is the nature of the force experienced by a positive test charge around a positive charge?

    <p>Repulsive.</p> Signup and view all the answers

    What is the direction of the force vectors around a positive charge?

    <p>Away from the positive charge.</p> Signup and view all the answers

    What is the nature of the force experienced by a positive test charge around a negative charge?

    <p>Attractive.</p> Signup and view all the answers

    What is the direction of the force vectors around a negative charge?

    <p>Towards the negative charge.</p> Signup and view all the answers

    How does the force between two charges vary with distance?

    <p>It decreases with distance.</p> Signup and view all the answers

    What is the direction of electric field lines around a positive charge?

    <p>Away from the charge</p> Signup and view all the answers

    What happens to the electric field lines when the magnitude of the charge increases?

    <p>The field lines get closer together</p> Signup and view all the answers

    What is the direction of the electric field around two negative charges?

    <p>Towards both charges</p> Signup and view all the answers

    What is the unit of electric field strength?

    <p>Newtons per coulomb (N·C⁻¹)</p> Signup and view all the answers

    What happens to the electric field lines when two like charges are placed next to each other?

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

    What is the direction of the force experienced by a positive test charge in a region where the electric fields cancel out?

    <p>Zero or no net force</p> Signup and view all the answers

    What is the formula for electric field strength in terms of the force and test charge?

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

    What is the formula for electric field strength in terms of the source charge and distance?

    <p>E = kQ / r²</p> Signup and view all the answers

    What happens to the electric field lines when the distance from the source charge increases?

    <p>The field lines get farther apart</p> Signup and view all the answers

    What is the direction of the electric field lines between two unlike charges?

    <p>From the positive charge to the negative charge</p> Signup and view all the answers

    What is the primary purpose of introducing the concept of an electric field?

    <p>To understand how charges influence each other across space</p> Signup and view all the answers

    What can be inferred about the direction of electric field lines around a point charge?

    <p>They always point away from the charge</p> Signup and view all the answers

    What happens to the force experienced by a test charge as it moves away from a point charge?

    <p>It decreases with distance according to Coulomb's law</p> Signup and view all the answers

    How do electric field lines around a negative charge differ from those around a positive charge?

    <p>They point in opposite directions</p> Signup and view all the answers

    Why are electric field lines useful for visualizing the electric field?

    <p>They illustrate the direction of the electric field at various points</p> Signup and view all the answers

    What can be said about the electric field around a single point charge?

    <p>It is radial, pointing away from or towards the charge</p> Signup and view all the answers

    What is the effect of increasing the magnitude of a point charge on the electric field lines?

    <p>The electric field lines become longer</p> Signup and view all the answers

    How do electric field lines around two unlike charges differ from those around two like charges?

    <p>They are opposite in direction for unlike charges, but the same for like charges</p> Signup and view all the answers

    What is the significance of the density of electric field lines around a charge?

    <p>It indicates the strength of the electric field.</p> Signup and view all the answers

    What happens to the electric field lines when two positive charges of equal magnitude are placed next to each other?

    <p>The electric field lines repel from both charges.</p> Signup and view all the answers

    What is the effect of increasing the magnitude of a charge on its electric field?

    <p>The electric field lines become denser.</p> Signup and view all the answers

    What is the direction of the electric field lines around a negative charge?

    <p>Towards the charge.</p> Signup and view all the answers

    What is the relationship between the electric field strength and the distance from the source charge?

    <p>The electric field strength decreases with distance.</p> Signup and view all the answers

    What happens to the electric field lines when two unlike charges are placed next to each other?

    <p>The electric field lines start from the positive charge and end at the negative charge.</p> Signup and view all the answers

    What is the electric field strength at a point where the electric fields of two like charges cancel out?

    <p>Zero.</p> Signup and view all the answers

    What is the significance of Coulomb's constant in the formula for electric field strength?

    <p>It is a conversion factor between units of force and charge.</p> Signup and view all the answers

    What is the effect of having charges of different magnitudes on the electric field lines?

    <p>The electric field lines are more influenced by the charge with the greater magnitude.</p> Signup and view all the answers

    What is the unit of electric field strength in terms of the fundamental units of force and charge?

    <p>N·C^-1.</p> Signup and view all the answers

    What is the primary reason for using electric field lines to represent the electric field?

    <p>To visualize the electric field strength at different points in space.</p> Signup and view all the answers

    Which of the following statements is true about the electric field around a point charge?

    <p>The electric field lines are denser near the charge and become less dense as the distance increases.</p> Signup and view all the answers

    What happens to the force experienced by a test charge as it moves away from a point charge?

    <p>The force decreases with distance.</p> Signup and view all the answers

    Which of the following is a consequence of the electric field lines around two unlike charges?

    <p>The electric field lines are denser near the charges and less dense in between.</p> Signup and view all the answers

    What is the significance of the direction of the electric field at a point in space?

    <p>It indicates the direction of the force experienced by a positive test charge.</p> Signup and view all the answers

    Which of the following statements is true about the electric field around two like charges?

    <p>The electric field lines are less dense between the charges.</p> Signup and view all the answers

    What is the primary purpose of introducing the concept of electric field lines?

    <p>To visualize the electric field strength at different points in space.</p> Signup and view all the answers

    What happens to the electric field lines when the magnitude of a point charge increases?

    <p>The electric field lines become denser.</p> Signup and view all the answers

    What is the primary reason for using electric field lines to represent the direction and relative strength of the electric field?

    <p>To simplify the representation of electric fields.</p> Signup and view all the answers

    In a configuration of two unlike charges, what occurs to a positive test charge placed exactly in the middle?

    <p>It experiences no net force.</p> Signup and view all the answers

    What is the effect of increasing the distance from the source charge on the electric field strength?

    <p>The electric field strength decreases.</p> Signup and view all the answers

    What occurs to the electric field lines when two like charges of equal magnitude are placed next to each other?

    <p>They point away from each other.</p> Signup and view all the answers

    What is the significance of the density of electric field lines around a charge?

    <p>It represents the strength of the electric field.</p> Signup and view all the answers

    What is the effect of having charges of different magnitudes on the electric field lines?

    <p>The electric field lines are more influenced by the charge with the greater magnitude.</p> Signup and view all the answers

    In a region where the electric fields of two like charges cancel out, what is the electric field strength?

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

    What is the relationship between the electric field strength and the distance from the source charge?

    <p>The electric field strength is inversely proportional to the square of the distance.</p> Signup and view all the answers

    What occurs to the force experienced by a test charge as it moves away from a point charge?

    <p>It decreases.</p> Signup and view all the answers

    What is the significance of Coulomb's constant in the formula for electric field strength?

    <p>It is a fundamental constant of nature.</p> Signup and view all the answers

    What is the main reason why electric field lines are used to represent the electric field around a charge?

    <p>To visualize the electric field strength at a point.</p> Signup and view all the answers

    What is the purpose of drawing electric field lines closer together in certain regions?

    <p>To represent the strength of the electric field in that region</p> Signup and view all the answers

    What is the effect of increasing the magnitude of a charge on its electric field lines?

    <p>The electric field lines become more dense around the charge</p> Signup and view all the answers

    What happens to the force experienced by a positive test charge when it moves closer to a negative charge?

    <p>The force increases.</p> Signup and view all the answers

    What is the direction of the electric field lines around two positive charges of equal magnitude?

    <p>The field lines point away from both charges</p> Signup and view all the answers

    How do the electric field lines around a positive charge and a negative charge differ?

    <p>They point in opposite directions.</p> Signup and view all the answers

    What is the relationship between the electric field strength and the distance from the source charge?

    <p>The electric field strength decreases as the distance from the source charge increases</p> Signup and view all the answers

    What is the relationship between the electric field strength and the distance from the source charge?

    <p>The electric field strength decreases with distance.</p> Signup and view all the answers

    What happens to the electric field lines when two unlike charges are placed next to each other?

    <p>The electric field lines start from the positive charge and end at the negative charge</p> Signup and view all the answers

    What is the purpose of using a test charge to define the electric field?

    <p>To determine the direction of the electric field.</p> Signup and view all the answers

    What can be inferred about the electric field around two like charges?

    <p>The electric field lines are weaker between the charges.</p> Signup and view all the answers

    What is the significance of the direction of the electric field lines at a point?

    <p>It indicates the direction of the force on a positive test charge</p> Signup and view all the answers

    What is the significance of the direction of the electric field at a point in space?

    <p>It indicates the direction of the force on a test charge.</p> Signup and view all the answers

    What is the effect of having charges of different magnitudes on the electric field lines?

    <p>The electric field lines are more densely packed around the stronger charge</p> Signup and view all the answers

    What is the unit of electric field strength in terms of the fundamental units of force and charge?

    <p>Newtons per coulomb</p> Signup and view all the answers

    What is the consequence of the electric field lines around two unlike charges?

    <p>The electric field lines are stronger between the charges and point towards the negative charge.</p> Signup and view all the answers

    What is the significance of the density of electric field lines around a charge?

    <p>It indicates the strength of the electric field at that point</p> Signup and view all the answers

    What happens to the electric field lines when two positive charges of equal magnitude are placed next to each other?

    <p>The electric field lines cancel out in the region between the charges</p> Signup and view all the answers

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