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Question 9
9.1 Define a magnetic field. (3) 9.2 The diagram below shows a bar magnet. Draw the magnetic field pattern associated with the bar magnet (3) 9.3 Is it possible for a magnet to have one pole? Yes or No. (1) [6]
question9
Question 9
Four metallic bars, suspended freely from a ceiling, interact, as shown in the diagrambelow. The points of attachment of X and Y on the ceiling are 4 cm apart. The two bars in the middle are bar magnets (X and Y) and the distance between themis 5 cm. One of the bars (A or B) … Read more
Question 9
9.1 Consider the redox reaction given below. 9.1.1 Define oxidation reaction in terms of electron transfer. (2) Write down the: 9.1.2 Formula of the reducing agent. (2) 9.1.3 Reduction half reaction (2) 9.2 Consider the redox reaction below: 9.2.1 Determine the oxidation number of nitrogen (N) in . (2) 9.2.2 Balance the above chemical equation … Read more
Question 9
9.1 The diagram below represents a current-carrying conductor. Draw the magnetic field pattern around this conductor. 9.2 A solenoid with a radius of 5 cm and 350 turns is pulled out of a magnetic field of strength 5,20 T in 0,1 second. The solenoid is placed perpendicular to the magnetic field. 9.2.1 State Faraday’s law … Read more
Question 9
In figure Q, P, T , S and R lie on the circle. M lies on QS such that PM || SR. PTS=145o 9.1 Calculate the size of: 9.1.1 (2) 9.1.2 (2) 9.1.3 (1) 9.2 Why is PR tangent to the circle passing through P, M and Q? (1) [6]
Question 9
A small isolated sphere A, with a mass of 0,2 g, carrying a charge of +7 x 10-9 C,is suspended from a horizontal surface by a string of negligible mass. A secondsphere B, carrying a charge of -8 x 10-9 C, on an isolated stand, attracts sphere A sothat the string forms an angle of … Read more
Question 9
MnO4 (aq) + H+(aq) + H2S(g) → Mn2+(aq) + S(s) + H2O(ℓ) 9.1 Define reduction in terms of oxidation numbers. (2) 9.2 Determine the oxidation number of manganese in the permanganate ion. (1) 9.3 Write down the FORMULA of the substance that undergoes oxidation. (1) 9.4 Explain the answer to QUESTION 9.3 in terms of … Read more
Question 9
9.1 For any two events, A and B, it is given that P(A) = 0,48 and P(B) = 0,26. Determine: 9.1.1 P(A and B) if A and B are independent events (2) 9.1.2 P(A or B) if A and B are mutually exclusive events (2) 9.2 A survey was conducted among 130 Grade 11 learners … Read more
Question 9
A compass is used to determine the poles of a magnet. The compass is placed in different positions around the magnet, as shown below. The dark arrow indicates the north pole of the compass. 9.1 Explain the term ferromagnetic materials. (2) 9.2 Is X a NORTH pole or a SOUTH pole? (1) 9.3 At which … Read more