Information Sheet

DATA FOR PHYSICAL SCIENCES GRADE 12 PAPER 1 (PHYSICS) GEGEWENS VIR FISIESE WETENSKAPPE GRAAD 12 VRAESTEL 1 (FISIKA) TABLE 1: PHYSICAL CONSTANTS/TABEL 1: FISIESE KONSTANTES TABLE 2: FORMULAE/TABEL 2: FORMULESMOTION/BEWEGING FORCE/KRAG WORK, ENERGY AND POWER/ARBEID, ENERGIE EN DRYWING WAVES, SOUND AND LIGHT/GOLWE, KLANK EN LIG ELECTROSTATICS/ELEKTROSTATIKA ELECTRIC CIRCUITS/ELEKTRIESE STROOMBANE ALTERNATING CURRENT/WISSELSTROOM

Question 11

11.1 A teacher in a science class explains how different types of spectra are obtained. The teacher uses the simplified diagrams shown below for the explanation. Name the type of spectrum of: 11.1.1 Y (1) 11.1.2 Z (1) 11.2 In an excited atom, electrons can ‘jump’ from lower energy levels to higher energy levels. They … Read more

Question 10

10.1 The diagram below shows different positions (ABCDA) of the coil in a DC generator for a complete revolution. The coil is rotated clockwise at a constant speed in a uniform magnetic field. The direction of the magnetic field is shown in the diagram below. 10.1.1 Write down the energy conversion that takes place during … Read more

Question 9

9.1 Learners investigated the relationship between potential difference (V) and current (I) for the combination of two resistors, R1 and R2. In one experiment, resistors R1 and R2 were connected in parallel. In a second experiment, resistors R1 and R2 were connected in series. The learners then plotted graph X, the results of one of … Read more

Question 8

A and B are two small spheres separated by a distance of 0,70 m. Sphere A carries a charge of +1,5 x 10-6 C and sphere B carries a charge of -2,0 x 10-6 C. P is a point between spheres A and B and is 0,40 m from sphere A, as shown in the … Read more

Question 7

Two small spheres, X and Y, carrying charges of +6 x 10-6 C and +8 x 10-6 C respectively, are placed 0,20 m apart in air. 7.1 State Coulomb’s law in words. (2) 7.2 Calculate the magnitude of the electrostatic force experienced by charged sphere X. (4) A third sphere, Z, of unknown negative charge, … Read more

Question 6

A police car moving at a constant velocity with its siren on, passes a stationary listener. The graph below shows the changes in the frequency of the sound of the siren detected by the listener. 6.1 State the Doppler Effect in words. (2) 6.2 Write down the frequency of the sound detected by the listener … Read more

Question 5

In the diagram below, a 4 kg block lying on a rough horizontal surface is connected to a 6 kg block by a light inextensible string passing over a light frictionless pulley. Initially the blocks are HELD AT REST. 5.1 State the work-energy theorem in words. (2) When the blocks are released, the 6 kg … Read more

Question 4

A 2 kg block is at rest on a smooth, frictionless, horizontal table. The length of theblock is x. A bullet of mass 0,015 kg, travelling east at 400 m∙s-1, strikes the block and passes straight through it with constant acceleration. Refer to the diagram below. Ignore any loss of mass of the bullet and … Read more

Question 3

Stone A is projected vertically upwards at a speed of 12 m∙s-1 from a height h above the ground. Ignore the effects of air resistance. 3.1 Calculate the time taken for stone A to reach its maximum height. (3) At the same instant that stone A is projected upwards, stone B is thrown vertically downwards … Read more