AQA A level Physics Paper 1 Questions & Answers(Graded A+)

AQA A level Physics Paper 1 Questions & AnswerCurrent - ANSWERRate of flow of charge Coulomb - ANSWERThe amount of charge passing a point when a current of 1A flows for 1s Potential difference - ANSWERThe work done per unit charge in moving a small point positive charge between two points Threshold Voltage for a Diode - ANSWERThe voltage at which a current will begin to flow at, assumed to be +0.6V if not stated Reverse Bias - ANSWERWhen very little currency can flow in the reverse direction of a diode Variable Resistor - ANSWERCan be used to change the current through a circuit can also be called a rheostat NTC Thermistor - ANSWER(A type of semiconductor) that has decreasing resistance when its temperature increases - negative temperature coefficient Transitional Temperature - ANSWERThe critical temperature at and below which a superconductor has zero resistivity Semiconductor - ANSWERA group of materials which conduct electricity (not as well as metals), when their temperature rises they can release more charge carriers and their resistance decreases Resistance - ANSWERThe ratio of a components potential difference to its current Volt - ANSWERThe potential difference across a component when 1 joule of energy is s(Graded A+)