resistances in d.c. series circuits. 4.7.2.3 For components connected State that the potential 1 Describe the differences Investigate how the cont. in parallel: difference across each between series and parallel current in each loop of a component in a circuits in terms of current and parallel circuit compares the potential difference parallel circuit is the potential difference. to the current in the across each component same. main branch of the is the same Students are not required to circuit. the current through Describe how the calculate the total resistance of the whole circuit is the currents in different resistors placed in parallel. Investigate the effect of sum of the currents of a parallel circuit adding two resistors in Why does adding resistors in through the separate change and give the series in a simple circuit, parallel reduce the resistance components reasons for this then adding the same of the circuit compared to the total resistance of two change. resistors in parallel in adding resistors in series? resistors is less than the the same circuit. Describe the effect on How does the current vary in resistance of the smallest the resistance of Find the resistance of each loop of a parallel circuit? individual resistor. adding resistors in resistors in parallel Calculating the total resistance parallel. by experimental of two resistors joined in methods. State that adding parallel is not required. resistors in parallel will make the total resistance less than
resistances in d.c. series circuits. 4.7.2.3 cont. For components connected in parallel: the potential difference across each component is the same the current through the whole circuit is the sum of the currents through the separate components the total resistance of two resistors is less than the resistance of the smallest individual resistor. State that the potential difference across each component in a parallel circuit is the same. Describe how the currents in different of a parallel circuit change and give the reasons for this change. Describe the effect on the resistance of adding resistors in parallel. State that adding resistors in parallel will make the total resistance less than 1 Describe the differences between series and parallel circuits in terms of current and potential difference. Students are not required to calculate the total resistance of resistors placed in parallel. Why does adding resistors in parallel reduce the resistance of the circuit compared to adding resistors in series? How does the current vary in each loop of a parallel circuit? Calculating the total resistance of two resistors joined in parallel is not required. Investigate how the current in each loop of a parallel circuit compares to the current in the main branch of the circuit. Investigate the effect of adding two resistors in series in a simple circuit, then adding the same resistors in parallel in the same circuit. Find the resistance of resistors in parallel by experimental methods.
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