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Electricity
Revision and exam practice for Electricity.
30
Objectives
10
Flashcards
10
Questions
90 min
Study time
OcrGcseCombined Science A GatewayElectricity
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30 objective pages available
Understanding Electric Charge: A Fundamental Property of Matter1 objectives
- Communicate the key features of charge is a property of all matter and that there are positive and negative charges.
Understanding Static Electricity and its Effects1 objectives
- Communicate the key features of the production of static electricity, and sparking, by rubbing surfaces, and evidence that charged objects exert forces of attraction or repulsion on one another when not in contact.
Understanding Static Electricity through Electron Transfer1 objectives
- Account for the way transfer of electrons between objects can explain the phenomena of static electricity.
Understanding Electric Current: The Flow of Charge1 objectives
- Retrieve and apply knowledge of current is a rate of flow of charge (electrons) and the conditions needed for charge to flow.
Current in a Series Circuit1 objectives
- Retrieve and apply knowledge of current has the same value at any point in a single closed loop.
Understanding the Relationship Between Charge, Current, and Time1 objectives
- Retrieve and apply knowledge of and use the relationship between quantity of charge, current and time.
Series and Parallel Circuits Explained1 objectives
- Communicate the key features of the differences between series and parallel circuits.
Understanding DC Circuits and Symbols1 objectives
- Develop knowledge and skill in d.c. circuits with the conventions of positive and negative terminals, and the symbols that represent common circuit elements.
Understanding Current, Potential Difference, and Resistance1 objectives
- Retrieve and apply knowledge of current ( ) depends on I R both resistance ( ) and potential V difference ( ) and the units in which these are measured.
Understanding Resistance and Ohm's Law1 objectives
- Retrieve and apply knowledge of and apply the relationship R V between , and and that for I R some resistors the value of remains constant but that in others it can change as the current changes.
Resistance in Electrical Components: Ohmic vs. Non-Ohmic Behaviour1 objectives
- Account for for some resistors the R value of remains constant but that in others it can change as the current changes.
Designing and Using Circuits to Explore Electrical Effects1 objectives
- Account for the design and use of circuits to explore such effects.
Understanding Linear and Non-Linear Circuit Elements through Graphs1 objectives
- Apply graphs to explore whether circuit elements are linear or non-linear.
Understanding I-V Characteristic Graphs for Circuit Elements1 objectives
- Apply graphs and relate the curves produced to the function and properties of circuit elements.
Understanding Resistance in Series and Parallel Circuits1 objectives
- Develop secure knowledge and application of explain, why, if two resistors are in series the net resistance is increased, whereas with two in parallel the net resistance is decreased (qualitative explanation only)
Understanding DC Series and Parallel Circuits1 objectives
- Work out the currents, potential differences and resistances in d.c. series and parallel circuits.
Understanding DC Circuits for Measurement and Testing1 objectives
- Account for the design and use of d.c. circuits for measurement and testing purposes.
Understanding Power Transfer in Electrical Circuits1 objectives
- Account for the way the power transfer in any circuit device is related to the potential difference across it and the current, and to the energy changes over a given time.
Understanding Series Circuits and Electrical Quantities1 objectives
- Use knowledge of the equations relating potential difference, current, quantity of charge, resistance, power, energy, and time, and solve problems for circuits which include resistors in series, using the concept of equivalent resistance.
Understanding Magnetic Poles: Attraction and Repulsion1 objectives
- Communicate the key features of the attraction and repulsion between unlike and like poles for permanent magnets.
Permanent vs. Induced Magnets: Key Differences1 objectives
- Communicate the key features of the difference between permanent and induced magnets.
Understanding Magnetic Fields1 objectives
- Communicate the key features of the characteristics of the magnetic field of a magnet, showing how strength and direction, change from one point to another.
Understanding Earth's Magnetism through a Dipping Compass1 objectives
- Account for the way the behaviour of a magnetic (dipping) compass is related to evidence that the core of the Earth must be magnetic.
Magnetic Effect of a Current and Field Directions1 objectives
- Communicate the key features of the way to show that a current can create a magnetic effect and describe the directions of the magnetic field around a conducting wire.
Understanding Magnetic Field Strength in Current-Carrying Conductors1 objectives
- Retrieve and apply knowledge of the strength of the field depends on the current and the distance from the conductor.
Enhancing the Magnetic Effect of Solenoids1 objectives
- Account for the way solenoid arrangements can enhance the magnetic effect.
The Force Between a Magnet and a Current-Carrying Conductor1 objectives
- Communicate the key features of the way a magnet and a current-carrying conductor exert a force on one another.
Fleming's Left-Hand Rule: Understanding Force, Current, and Magnetic Field1 objectives
- Develop knowledge and skill in Fleming’s left-hand rule represents the relative orientations of the force, the current and the magnetic field.
Calculating Force on a Conductor in a Magnetic Field (Higher)1 objectives
- Use knowledge of the equation that links the force on a conductor to the magnetic flux density, the current and the length of conductor to calculate the forces involved.
Understanding the Motor Effect and Electric Motors (Higher Only)1 objectives
- Account for the way the force exerted from a magnet and a current-carrying conductor is used to cause rotation in electric motors.
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Practice preview
- Unofficial practice material Explain why direct current (d.c.) circuits are particularly well-suited for measuring properties of individual components like resistors. [4 marks]
- Consider a circuit with a single resistor. What happens to the overall resistance if another resistor is added in parallel to the first one?
- According to the right-hand grip rule, if your thumb points in the direction of conventional current along a straight wire, what do your curled fingers indicate?
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