physical sciences

10.1 The circuit below consists of a 6 Ω and 15 Ω resistor connected in parallel and an unknown resistor R, in series. An ammeter, a high-resistance voltmeter,  a closed switch and battery are connected, as shown. The resistance of the  battery and wires can be ignored. The total power dissipated in the parallel part … Read more

An induction coil of area 48,6 cm2 and 200 windings is rotated clockwise in a constant  magnetic field of magnitude 2,4 T. Refer to the diagram below. The graph below shows how the induced emf varies with the inverse of time. 9.1 State Faraday’s law in words. (2) 9.2 Use the information in the graph … Read more

Two IDENTICAL point charges, X and Y, are placed 2 mm apart. Point P is 3 mm to  the right of charge Y. The net electric field at point P is 5,44 × 106 N∙C-1 to the left.  8.1 Define the term electric field at a point. (2) 8.2 Are the charges NEGATIVE or POSITIVE? … Read more

An experiment is set up, as shown below, to investigate the effect of slit width on the degree of diffraction. Distance y on the diagram represents the distance between the screen and the single slit. Distance x on the diagram represents the width of the central bright band. 7.1 Write down an investigative question for … Read more

Experiments are performed to compare the refractive indices of different materials.   In one experiment a light ray passes from air to material A and the angles of incidence  and refraction are measured. The refractive index for air is 1.  The graph below was drawn using the results of material A. 6.1 Define the term angle of … Read more

The acceleration due to gravity on planet X is 2,7 m∙s-2. The radius of this planet is  a third (⅓) of the radius of Earth.  5.1 Explain the difference between weight and mass. (2) 5.2 Calculate the mass of planet X. (4)  5.3 Determine the factor by which the weight of an object on planet … Read more

Various options are provided as possible answers to the following questions. Eachquestion has only ONE correct answer. Choose the answer and write only theletter (A–D) next to the question number (1.1–1.10) in the ANSWER BOOK, forexample 1.11 E. 1.1 Which ONE of the bonds between the atoms below has the highest polarity? A H – … Read more

A tow truck pulls a car along a gravel road.   The force applied by the engine of the tow truck is 9 000 N. The mass of the tow truck  is 1 300 kg and the mass of the car is 950 kg. The vehicles are connected to each  other by an inelastic tow bar … Read more