Electric Charges
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Questions and Answers

What is the result of an imbalance between negative and positive charges in an object?

  • The object has no net charge
  • The object becomes magnetized
  • Static electricity (correct)
  • The object becomes electrically charged

    • What happens when two negatively charged balloons are brought together?

  • They combine to form a single balloon
  • They attract each other
  • They repel each other (correct)
  • They become neutral

    • Who named the two different kinds of electric charge?

  • Benjamin Franklin (correct)
  • Anuradha Bhagwat
  • Isaac Newton
  • Albert Einstein

    • What is the fundamental principle of electric charge?

    <p>Electric charge is conserved</p> Signup and view all the answers

    What is the term for the science of static electricity?

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

    What is the result of an object having an equal amount of positive and negative charge?

    <p>The object becomes neutral</p> Signup and view all the answers

    What is the location of protons and neutrons in an atom?

    <p>In the center of the atom, called the nucleus</p> Signup and view all the answers

    What is the result when an electron is transferred from one neutral atom to another?

    <p>The second atom gains a negative charge and the first atom loses a negative charge</p> Signup and view all the answers

    What is the principle that is demonstrated by the conservation of electric charge?

    <p>Principle of conservation of charge</p> Signup and view all the answers

    What did Robert Millikan find in his oil drop experiment in 1909?

    <p>The charge of an object is always a multiple of a fundamental unit of charge</p> Signup and view all the answers

    What is the symbol for the fundamental unit of charge?

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

    What is the charge of a proton?

    <p>+e</p> Signup and view all the answers

    What is the primary mechanism for charging insulators?

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

    What is the characteristic of superconductors at or below a certain temperature?

    <p>Zero electrical resistance</p> Signup and view all the answers

    What is the approximate number of excess electrons in a typical lightning bolt with 5 C of charge?

    <p>3.125 × 10^18 electrons</p> Signup and view all the answers

    Which type of material is characterized by electrical properties between those of insulators and conductors?

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

    What is the process of charging conductors?

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

    What is the typical state of most objects in terms of electric charge?

    <p>Electrically neutral</p> Signup and view all the answers

    What is the primary method of transferring electrons in conduction?

    <p>Through direct contact between objects</p> Signup and view all the answers

    What happens to the electrons on the metal sphere when it is grounded?

    <p>Some of them travel through the wire to the ground</p> Signup and view all the answers

    What is the result of charging an object by induction?

    <p>The object develops an opposite charge to the original charged object</p> Signup and view all the answers

    What is polarization in the context of charging an object?

    <p>The effect of more positive/negative charge accumulating on one side of an insulator</p> Signup and view all the answers

    Why does the charged rubber rod not lose its negative charge in the process of induction?

    <p>Because the rod is not in contact with the sphere</p> Signup and view all the answers

    What is the main difference between charging by conduction and charging by induction?

    <p>The transfer of electrons through direct contact or not</p> Signup and view all the answers

    What is the net charge of an insulator that has been polarized?

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

    How can a conductor be charged?

    <p>Either by contact or induction</p> Signup and view all the answers

    What is the effect of like charges on each other?

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

    What is the fundamental unit of charge?

    <p>The magnitude of the charge of an electron</p> Signup and view all the answers

    What happens when a charged object is brought near an insulator?

    <p>The insulator is polarized</p> Signup and view all the answers

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