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
(Start on a new page.) 10.1 A learner is investigating the photoelectric effect for two different metals, silver and sodium, using light of different frequencies. The maximum kinetic energy of the emitted photoelectrons is plotted against the frequency of the light for each of the metals, as shown in the graphs below. 10.1.1 Define the … Read more
(Start on a new page.) 9.1 A generator is shown below. Assume that the coil is in a vertical position. 9.1.1 Is the generator above AC or DC? Give a reason for the answer. (2) 9.1.2 Sketch an induced emf versus time graph for ONE complete rotation of the coil. (The coil starts turning from … Read more
(Start on a new page.) 8.1 In the circuit below the battery has an emf (ε) of 12 V and an internal resistance of 0,2 Ω. The resistances of the connecting wires are negligible. 8.1.1 Define the term emf of a battery. (2) 8.1.2 Switch S is open. A high-resistance voltmeter is connected across points … Read more
(Start on a new page.) 7.1 In an experiment to verify the relationship between the electrostatic force, FE, and distance, r, between two identical, positively charged spheres, the graph below was obtained. 7.1.1 State Coulomb’s law in words. (2) 7.1.2 Write down the dependent variable of the experiment. (1) 7.1.3 What relationship between the electrostatic … Read more
(Start on a new page.) 6.1 An ambulance is moving towards a stationary listener at a constant speed of 30 m∙s-1. The siren of the ambulance emits sound waves having a wavelength of 0,28 m. Take the speed of sound in air as 340 m∙s-1. 6.1.1 State the Doppler effect in words. (2) 6.1.2 Calculate … Read more
(Start on a new page.) A pendulum with a bob of mass 5 kg is held stationary at a height h metres above the ground. When released, it collides with a block of mass 2 kg which is stationary at point A. The bob swings past A and comes to rest momentarily at a position … Read more
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
(Start on a new page.) The graph below shows how the momentum of car A changes with time just before and just after a head-on collision with car B. Car A has a mass of 1 500 kg, while the mass of car B is 900 kg.Car B was travelling at a constant velocity of … Read more
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