AQA AS-Level Physics Definitions Q&A

AQA AS-Level Physics Definitions Q&A 1. Electric Current - answer-The rate of flow of charge. 2. Potential Difference - answer-The work done per unit charge. 3. Resistance - answer-Potential difference across it / current through it. 4. Ohm's Law - answer-Current is proportional to potential difference as long as the temperature is constant. 5. EMF - answer-The electrical energy supplied per unit charge passing through it. 6. Root Mean Square - answer-This of an AC voltage is equal to the DC voltage which would have the same heating effect. 7. Work Function - answer-The minimum energy required to release an electron from the surface of a metal. 8. Threshold Frequency - answer-The minimum frequency of radiation required to release an electron from the surface of a metal...