Current Electricity: Concept of Charge
30 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What determines the quantity of charge on a body?

  • Number of electrons deficit (correct)
  • Number of photons in excess
  • Number of protons in excess
  • Number of neutrons in excess
  • What is the charge on 1 electron?

  • -1.6 x 10^-18 C
  • -1.6 x 10^-21 C
  • -1.6 x 10^-19 C (correct)
  • -1.6 x 10^-20 C
  • What is the SI unit of electric current?

  • Ohm/second
  • Volt/second
  • Coulomb/second (correct)
  • Ampere/second
  • What constitutes electric current?

    <p>Rate of flow of charge</p> Signup and view all the answers

    In a non-conductor (insulator), where does the charge reside?

    <p>At a point where there is an excess or deficit of electrons</p> Signup and view all the answers

    What constitutes the flow of current in metals?

    <p>Free electrons</p> Signup and view all the answers

    What is the formula for calculating the current in the direction of motion of cations in an electrolyte?

    <p>I = (n1q1 + n2q2) / t</p> Signup and view all the answers

    What is the cause and deciding factor of the flow of current?

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

    What is the unit of electric potential?

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

    What happens when two like charges are brought near each other?

    <p>Work must be done to move charge A against a repulsive force</p> Signup and view all the answers

    What is the cause of resistance in a conductor?

    <p>Loss of electrons from the outer orbit</p> Signup and view all the answers

    What happens when a potential difference is applied to a metal wire?

    <p>Electrons experience a force and begin to move</p> Signup and view all the answers

    In Ohm's law, what does 'V' stand for?

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

    What is defined as the amount of work done per unit charge in bringing a positive test charge from infinity to a point?

    <p>Electric potential at a point</p> Signup and view all the answers

    Potential at a point is defined as the amount of work done per unit charge in bringing a positive test charge from infinity to that ______

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

    The SI unit of electric potential is ______

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

    In a conductor, resistance is the obstruction offered to the flow of ______

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

    The cause of resistance in a conductor is the loss of electrons from its outer ______

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

    When two like charges are brought near each other, work must be done to move charge A against the repulsive force on it due to charge ______

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

    The unit of electric potential is the ______

    <p>volt (V)</p> Signup and view all the answers

    In a conductor, when a potential difference is applied, electrons experience a force and begin to ______

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

    The flow of current in metals is caused by the movement of ______

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

    The potential at a point is said to be 1 volt when 1 joule of work is done in bringing 1 coulomb charge from infinity to that ______

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

    The direction of flow of current is a deciding factor in the flow of ______

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

    Charge on 1 electron = – 1.6 x 10-19 C 1 Coulomb = 𝟏 𝟏.𝟔 𝒙 𝟏𝟎𝟏𝟗 = 6.25 x 1018 electrons 4. In a non-conductor (insulator) → charge resides at a point, where there is an excess / deficit of electrons → static charge: do not flow - In a conductor like metal → large no. of free electrons in it → charges flow CONCEPT OF CURRENT: Charge in motion → constitutes: Electric ______

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

    Current → rate of flow of ______ Amt. of ______ flowing across cross-section of a conductor → per unit time 2. Denoted by → I / I not unit CS 3. Scalar Quantity → denotes: flow of ______ is in opposite direction **Direction of current in conductor; do not follow vector algebra If ______ Q → flows through cross-section (normal to dir. of motion) in time t, 𝑄 I= 𝑡 Unit: 1. SI unit → C s-1: ampere (A) **French physicist Andre Ampere 2. 1 Ampere → amt. of current flowing in a conductor, when 1 coulomb Charge 6 x 1018 e- passes in 1 second **irrespective of SA Flow of

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

    SI unit → C s-1: ampere (A) **French physicist Andre Ampere 2. 1 Ampere → amt. of ______ flowing in a conductor, when 1 coulomb Charge 6 x 1018 e- passes in 1 second **irrespective of SA Flow of ______: 1. Metals: moving charges are free electrons → constitute the

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

    In a conductor like metal → large no. of free electrons in it → charges

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

    Charge in motion → constitutes: Electric

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

    Flow of

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

    Use Quizgecko on...
    Browser
    Browser