An outdoor festival venue is decorated with multiple strings of colored lamps powered by a 240 V generator. Each string of lamps consists of fifty 240 V lamps, and the resistance of each lamp is 600 Ω. Ignore the internal resistance of the generator.
State whether the lamps on a particular string are connected in series or in parallel.
Calculate the current in each lamp when it is operating at normal brightness.
Calculate the total current that the generator supplies to each string of lamps.
The generator supplies current to several of these strings. State whether the strings themselves are connected to the generator in series or in parallel.
One of the lamps in a string burns out, forming an open circuit. What effect, if any, does this have on: \newline (i) the other lamps in the same string? \newline (ii) the lamps in other strings?
136 exam-style questions on CIE IGCSE Physics 4.3 Electric circuits, covering 4.3.1a Circuit diagrams and circuit components, 4.3.2a Series circuits, 4.3.2b Parallel circuits, 4.3.2c Current and potential difference in circuits, 4.3.2d Combined resistance of resistors in parallel, and 4.3.3 Action and use of circuit components. Each one has a worked solution and a mark scheme showing where the marks go.