{"id":11204,"date":"2022-11-19T15:30:01","date_gmt":"2022-11-19T10:00:01","guid":{"rendered":"https:\/\/www.aplustopper.com\/?p=11204"},"modified":"2022-11-19T15:43:54","modified_gmt":"2022-11-19T10:13:54","slug":"relationship-electric-current-potential-difference","status":"publish","type":"post","link":"https:\/\/www.aplustopper.com\/relationship-electric-current-potential-difference\/","title":{"rendered":"What is the Relationship between Electric Current and Potential Difference?"},"content":{"rendered":"

What is the Relationship between Electric Current<\/a> and Potential Difference?<\/strong><\/h2>\n
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  1. When an electric charge is placed at a point in an electric field, it experiences an electric force acting on it. Work is required to move the electric charge in the electric field against this force. This charge is said to have an electric potential at that point.<\/li>\n
  2. Figure shows two points, A and B on an electric field line of a positively-charged sphere. Point A, which is nearer to the sphere, has a higher potential than point B.
    \n\"What<\/li>\n
  3. When a positive test charge is placed at point A, the positive charge will move away from point A (higher potential) to point B (lower potential).<\/li>\n
  4. If you want to move the positive charge from point B to point A, work or energy is required to move the charge against the electric field. This work done to move one unit of charge from point B to point A is known as the potential difference<\/strong> between the two points.<\/li>\n
  5. Similarly, when a battery is connected to a bulb in a circuit, as shown in Figure, it creates a potential difference, that is, a difference in the potential energy of the charges in the conductors connected to its terminals. When the switch is off, the positive terminal, P is at a higher potential and the negative terminal Q is at a lower potential. When the switch is on, the potential difference between the two terminals causes the charges to flow across the bulb in the circuit and light up the bulb.
    \n\"What<\/li>\n
  6. The energy carried by the charges will be converted into other forms of energy such as light and heat energy in the bulb. So work is done when electrical energy carried by the charges is dissipated as heat and light energy after crossing the bulb.<\/li>\n
  7. The potential difference between two points in an electric field is defined as the work done or the energy that would be required to move one coulomb of charge from one point to another<\/strong>.<\/li>\n
  8. In symbols:
    \n\"WhatWhere, V = potential difference (p.d.) in volt (V)
    \nW = work done in driving the charge between the two points in joule (J)
    \nQ = amount of positive charges in coulomb (C)<\/li>\n
  9. The SI unit for potential difference is volt (V).<\/li>\n
  10. The potential difference between two points in an electric field is one volt<\/strong>, if the work done to move one coulomb<\/strong> of charge between the two points is one joule<\/strong>.
    \n\"What<\/li>\n<\/ol>\n

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