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List of data, formulae and relationships. Acceleration of free fall g = 9.81 m s−2 (close to Earth’s surface) Boltzmann constant k = 1.38 × 10−23 J K−1. Coulomb law constant. Electron charge. Electron mass. Electronvolt. Gravitational constant. Gravitational field strength.
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maximum theoretical efficiency =. input power = calorific value × fuel flow rate. indicated power = ( × ( − ) = output or brake power. friction power =. heat pumps and refrigerators –. refrigerator: =. hp =.
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E.M.F and Internal Resistance All power sources have a value for their EMF. Electromotive force can be defined as the amount of energy supplied by the source per unit charge. It is measured in Volts. In reality, the terminal potential difference of the power source is never equal to this EMF value.
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This post contains all the important formulas that you need for A Level Physics. (Equivalent to AP Physics) If you do not recognise any of the terms listed here, you should go review the respective topic.
Revision notes on 5.4.1 Electromotive Force & Internal Resistance for the AQA A Level Physics syllabus, written by the Physics experts at Save My Exams.
Definition and Types of Forces. A force is any influence that changes the motion of a body, either from its state of rest or motion. There are two main classifications of forces - contact forces and non-contact forces. Contact forces require physical interaction between objects.
People also ask
How do you calculate resistance if a power supply is varying?
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By varying the power supply, we can vary the potential difference across the component, and record the p.d. and current, to calculate the resistance, which is equal to 1 over the gradient of the I-V graph.
