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The potential difference across two points is measured using a Voltmeter.A Voltmeter is connected in parallel to a device.

Symbol for Voltmeter

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INSTRUMENTS TO MEASURE CURRENT AND POTENTIAL DIFFERENE

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INSTRUMENTS TO MEASURE CURRENT AND POTENTIAL DIFFERENE

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Current is measured  by an Ammeter.An Ammeter is connected in series.

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The direction of flow of water is determined by the difference in level of water and not by the quantity of water in the two containers.Similarly in an electric circuit,the electric potential determines the direction of flow of charges.The quantity of charge that flows will depend on the potential difference between two points.

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Q3 Find the amount of charge that will move between two points having a potential difference of 3V and the work done is 12J. V = W/QQ = W/VQ = 12/ 3Q = 4C

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Q3 Find the amount of charge that will move between two points having a potential difference of 3V and the work done is 12J. V = W/QQ = W/VQ = 12/ 3Q = 4C

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Q2 Find the work done in moving 12 C with the potential difference of 2.8  volt.V =W/QW = VX QW = 3X 12W = 36 J

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Q2 Find the work done in moving 12 C with the potential difference of 2.8  volt.V =W/QW = VX QW = 3X 12W = 36 J

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  Q1 Find the potential difference between two points if the work done to move       15C of charge is 75 J.V = W/QV = 75/ 15V = 5 V

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  Q1 Find the potential difference between two points if the work done to move       15C of charge is 75 J.V = W/QV = 75/ 15V = 5 V

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The potential difference between the two terminals of the cell that makes the electrons flow around the circuit.The positive terminal of the cell has lower concentration of electrons as compared to the negative terminal of the cell.The positive terminal is said to be at a higher potential and the negative terminal at a lower potential.Potential difference is defined as the work done in moving a unit charge from one point to another.It is denoted by the letter V.Potential difference =  work done               ;              V = W/Q                                  Charge moved

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The potential difference between the two terminals of the cell that makes the electrons flow around the circuit.The positive terminal of the cell has lower concentration of electrons as compared to the negative terminal of the cell.The positive terminal is said to be at a higher potential and the negative terminal at a lower potential.Potential difference is defined as the work done in moving a unit charge from one point to another.It is denoted by the letter V.Potential difference =  work done               ;              V = W/Q                                  Charge moved

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Q3.How much time must a charge of 15 coloumb flow through a conductor to constitute a current of 5 ampere?I = Q/t t = Q/ It = 15/5   = 3 s

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Q3.How much time must a charge of 15 coloumb flow through a conductor to constitute a current of 5 ampere?I = Q/t t = Q/ It = 15/5   = 3 s

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Q2. Find the amount of charge flowing through a conductor if an electric         current of 6A flows for 8 seconds.I = Q/tQ = ItQ= 6 x 8   = 48 C

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Q2. Find the amount of charge flowing through a conductor if an electric         current of 6A flows for 8 seconds.I = Q/tQ = ItQ= 6 x 8   = 48 C

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Q1. Find the strength of an electric current in a conductor of charge 12 coloumb flowing in 4 seconds.Solution I = Q/ tI = 12/4  = 3 A

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Q1. Find the strength of an electric current in a conductor of charge 12 coloumb flowing in 4 seconds.Solution I = Q/ tI = 12/4  = 3 A

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Amount of work done in moving a unit charge frim one point to the other

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SI unit for Electric Current is ampere(A) and current is denoted by an uppercase i

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SI unit for Electric Current is ampere(A) and current is denoted by an uppercase i

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Electric current: The Flow of charged particles through a conducting material in a particular direction is called  current.In electricity the charged particles are the electrons that flow across the conductor  and cause an electric current.

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Electrons , neutrons and neutrons