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
A circular coil with 250 windings (turns) and a radius of 0,04 m, is rotated clockwise inside a magnetic field with a field strength of 3,2 T. 9.1 Calculate the magnetic flux through the coil at the position indicated on the diagram, where the coil is perpendicular to the field. (3) 9.2 If the coil … Read more
Two charged spheres, X and Y, are placed in a vacuum at a distance of 0,04 m apart. 8.1 Draw the resulting electric field pattern between the two charges. (3) 8.2 Calculate the electrostatic force sphere X experiences due to the charge on sphere Y. (4) 8.3.1 If sphere Y is at a fixed position … Read more
9.1 Two identical metal spheres, P and Q, separated by a distance d, aresuspended from an insulated rigid wooden bar, as shown in the diagrambelow. The charge on the spheres are –4 μC and +8 μC respectively. 9.1.1 Sphere Q experiences an electrostatic force. In which direction will sphere Q move? Write down only TO … Read more
Two learners investigate the effect of the slit width on the degree of diffraction. They use a green light with a wavelength 520 nm. They set up an experiment, as shown below, and measure the position of the first dark line from the centre of the bright, central band when changing the slit width. The … Read more
8.1 All types of waves undergo diffraction. 8.1.1 Define the term diffraction. (2) 8.1.2 State the condition necessary for diffraction to occur in a single slit. (2) 8.2 Light of wavelength 460 nm passes through a single slit of width 7 x 10-6 m.A diffraction pattern is observed on a screen, as shown in the … Read more
The diagram below shows a light ray travelling through an optical fibre. The fibre ismade from two different glass materials known as the core glass and the outercladding glass. These two types of glass materials have different refractive indices. 7.1 State the TWO conditions necessary for total internal reflection to occur. (4) 7.2 Which part … Read more
Olive oil floats on water because its density is less than the density of water. However, the refractive index of olive oil is 1,47 while the refractive index of water is 1,33. 6.1 Define the term refractive index. (2) 6.2 Calculate the speed of light through olive oil. (3) 6.3 If light travels through water … Read more
Two satellites orbiting the Earth are situated on opposite sides of the Earth. Satellite A has a mass of 3 800 kg and Satellite B has a mass of 4 500 kg. Satellite A is at a height of 25 000 km above the surface of the Earth. 5.1 State Newton’s Universal Gravitational Law in … Read more
The table below shows accurate values for the refractive indices (relative to air) ofsome optical media obtained during refraction experiments. The optical densities of themedia increase from water to diamond. 6.1 What important deduction about the relationship between a medium and itsrefractive index can be made from the information above?(2) 6.2 Define the term refraction.(2) … Read more