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. (C)</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. (A)</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. (B)</p> Signup and view all the answers

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

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

How does the force between two charges vary with distance?

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

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

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

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

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

What is the unit of electric field strength?

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

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

<p>Towards the charge. (B)</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. (D)</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. (D)</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. (C)</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. (A)</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. (D)</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. (D)</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. (D)</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. (A)</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. (B)</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. (C)</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. (D)</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. (A)</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. (C)</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. (A)</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. (C)</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. (A)</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. (D)</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. (C)</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. (C)</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. (D)</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. (A)</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. (B)</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. (D)</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. (C)</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. (C)</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 (B)</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 (D)</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. (D)</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 (C)</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. (D)</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 (A)</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. (B)</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 (C)</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. (A)</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. (D)</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 (D)</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. (D)</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 (C)</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 (A)</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. (A)</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 (C)</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 (D)</p> Signup and view all the answers

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