grade11

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

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

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