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Physical Science (Physics) (Gr10 IEB June Exams Notes) - AdresteaJarde R100,00   Add to cart
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Physical Science (Physics) (Gr10 IEB June Exams Notes) - AdresteaJarde
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The study notes for the grade 10 IEB June Examinations. Written by an academic. These notes are SPECIFICLLY PHYSICS, there is no chemistry.

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  • June 22, 2022
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  • 2021/2022
  • Interview
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PHYSICS: THE FIXATION ON EXAMINATION (GR.10)
By AdresteaJarde


Chapter 1: Current and potential difference.
WORK
 Current: Current is a measure of the rate of flow of electric charge in a circuit.
o Electric charge is measured in coulombs. W
o A current of 1A is a/1 coulombs of charge flowing every second.
V Q CHARGE
▪ 1A = 1 C/s
= C.s-1 VOLTS

 A 1V cell gives 1 joule (J) of energy to each coulomb of charge.
o Cell: A useful source of energy.
▪ A chemical reaction takes place inside the cell, and it produces potential difference (V)
▪ Fun Fact: Magnesium Oxide (MgO) can be found within a cell.
o Battery: Consists of 2+ cells that are joined together.
▪ The potential difference (in a battery) is the sum of potential differences across cells. Eg.
|I|I|I; Each cell has a potential difference (V) of 1.5V. To calculate the potential difference we have to
add the potential differences all together. Therefore, 1.5V*3 = 4.5V.
 Fact: Voltage is another word for potential difference.
 Measurements and Units of Measurement
o Voltmeter – Measures potential difference (V).
▪ Unit: Volts.
▪ Connection: Parallel
▪ High internal Resistance.
o Ammeter – Measures Current (I).
▪ Unit: Amperes
▪ Connection: Series
▪ Low internal resistance. |I
 Fact: Currents always pass along the path of least resistance.
o Short Circuits: A current flowing along a path without passing through
the components. Eg.

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