Podcast
Questions and Answers
When charges are considered as point charges, what assumption is made about their sizes compared to the distances between them?
When charges are considered as point charges, what assumption is made about their sizes compared to the distances between them?
- Their sizes are much larger than the distances between them.
- Their sizes are insignificant, but their masses must be considered.
- Their sizes are equal to the distances between them.
- Their sizes are negligible compared to the distances between them. (correct)
What is the physical quantity that describes the force experienced by a unit positive charge placed at a point in an electric field?
What is the physical quantity that describes the force experienced by a unit positive charge placed at a point in an electric field?
- Electric current
- Electric flux
- Electric potential
- Electric field strength (correct)
Which of these statements best describes the principle of conservation of charge?
Which of these statements best describes the principle of conservation of charge?
- The total charge of an isolated system can change over time.
- Charges are always in motion within an isolated system.
- Charges can only be transferred between objects within an isolated system. (correct)
- Charges can be created or destroyed in an isolated system.
What distinguishes the two types of charges, often referred to as positive and negative?
What distinguishes the two types of charges, often referred to as positive and negative?
Coulomb's law, which describes the force between two point charges, is represented by the equation F = kq1q2/r². In this equation, what does 'k' represent?
Coulomb's law, which describes the force between two point charges, is represented by the equation F = kq1q2/r². In this equation, what does 'k' represent?
When a glass rod is rubbed with silk, what happens to the charges on the glass rod?
When a glass rod is rubbed with silk, what happens to the charges on the glass rod?
What does the dielectric constant of a material indicate?
What does the dielectric constant of a material indicate?
If two charges of equal magnitude but opposite sign are placed at a distance of 1 meter apart in a vacuum, what is the magnitude of the electric force between them?
If two charges of equal magnitude but opposite sign are placed at a distance of 1 meter apart in a vacuum, what is the magnitude of the electric force between them?
Flashcards
Point charges
Point charges
Charged bodies treated as having no size at large distances.
Electric field
Electric field
Force per unit charge experienced by a positive test charge.
Charge conservation
Charge conservation
Total charge in an isolated system remains constant.
Dielectric constant of a metal
Dielectric constant of a metal
Signup and view all the flashcards
Coulomb's law
Coulomb's law
Signup and view all the flashcards
Quantisation of charge
Quantisation of charge
Signup and view all the flashcards
Polarity of charge
Polarity of charge
Signup and view all the flashcards
Glass rod and silk
Glass rod and silk
Signup and view all the flashcards
Study Notes
Electric Charges and Fields - MCQs
- Point Charges: If the size of charged bodies is very small compared to the distance between them, they can be treated as point charges.
- Electric Field: The force per unit charge is known as the electric field.
- Conservation of Charge: The total charge of an isolated system is not conserved.
- Dielectric Constant of a Metal: The dielectric constant of a metal is infinite.
- Force Between Charges (Vacuum): Two charges of 1 Coulomb each, separated by 1 meter in a vacuum, experience a repulsive force of 9 × 109 N.
- Quantization of Charge: Charge is quantized; that is, the smallest possible charge is a fixed amount (not a fraction of a coulomb). Charges are never destroyed. A minimum permissible charge exists on a particle.
- Property Differentiating Charges: The property that differentiates two types of charges is polarity.
- Field Strength Information: Electric field gives information about the strength, direction, and nature of the electric field.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
