10.1 The apparatus illustrated in the simplified diagram below is used to demonstrate the photoelectric effect. 10.1.1 Define the term photoelectric effect. (2) Incident light of frequency 1,2 x 1015 Hz is shone onto the metal plate and electrons are emitted.Calculate the:10.1.2 Number of photoelectrons emitted in one second if the totalenergy transferred by the … Read more
When light of various frequencies is incident on the metal cathode of a photocell,photoelectrons are emitted from the surface of the cathode.The graph below shows the relationship between the maximum kinetic energy (Ek(max))of an emitted photoelectron and the wavelength of the incident light. 10.1 Use the graph to determine the maximum kinetic energy of the … Read more
10.1 The flow diagram below shows the processes involved in the industrialpreparation of fertiliser Q. Write down the: 10.1.1 Name of process X (1) 10.1.2 Name of process Y (1) 10.1.3 NAME or FORMULA of gas P (1) 10.1.4 Balanced equation for the formation of compound B (3) 10.1.5 Balanced equation for the formation of … Read more
Ammonia is an important fertiliser. Large amounts are prepared from hydrogen and nitrogen in industry. 10.1 For the industrial preparation of ammonia, write down: 10.1.1 The name of the process used (1) 10.1.2 A balanced equation for the reaction that occurs (3) 10.1.3 The source of nitrogen (1) 10.2 The yield of ammonia changes with … Read more
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
(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
10.1 The equations below represent two industrial processes involved in the preparation of ammonium nitrate. Write down the:10.1.1 NAME of substance A (1)10.1.2 FORMULA of substance B (1)10.1.3 NAME given for reaction I (1)10.1.4 NAME or FORMULA of the catalyst used in reaction I (1)10.1.5 Name of process X (1)10.1.6 Name of process Y (1)10.1.7 … Read more
10.1 A teacher demonstrates how current can be obtained using a bar magnet, a coil and a galvanometer. The teacher moves the bar magnet up and down, as shown by the arrow in the diagram below. 10.1.1 Briefly describe how the magnet must be moved in order to obtain a LARGE deflection on the galvanometer. … Read more