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Question 10
10.1 The arrangement of apparatus to demonstrate Faraday’s law ofelectromagnetic induction is shown below. 10.1.1 State Faraday’s law of electromagnetic induction in words. (2) 10.1.2 State TWO ways in which the deflection on the galvanometer can beincreased. (2) 10.2 A coil with area 0,6 m2 is held with its axis coinciding with the direction of … Read more
Question 10
An experiment is done to verify that the potential difference across a conductor is directly proportional to the current in the conductor if the temperature stays constant. Four cells, each with an emf of 1,5 V, are connected in series with an ammeter, switch S and a combination of a resistor R and resistors of … Read more
Question 10
M is the centre of the circle SVQR having equal chords SV and QR. [9]
Question 10
Gold and iron are two of many minerals mined in South Africa. Iron is mined inopen-cast mines, while gold is usually found in deep-shaft (underground) mines.During the process of refining, the following chemical reactions take place to extractthe metal from the ore: Gold is dissolved in a solution containing cyanide ions (CN–) to extract it … Read more
Question 10
The discovery of gold played a significant role in the economic development of SouthAfrica. In 1970 gold mining in South Africa contributed 68 per cent to global production. 10.1 Which TWO mining methods are used in South Africa? (2) 10.2 Give TWO reasons why mining is important for the South African economy. (2) 10.3 State … Read more
Question 10
The simplified diagram below shows a blast furnace used for the extraction of iron from iron ore. P represents a reactant added to the blast furnace. Q and R represent products that leave the blast furnace. Limestone and coke are added to the blast furnace, as shown in the diagram above. Write down the function … Read more