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| Pregunta | Respuesta |
| Potential Difference (P.D.) | The electrical energy transferred per unit charge when electrical energy is converted into another form of energy |
| Ammeter | a component to measure electric current |
| Acceleration of Freefall | 9.81 ms-1 |
| Absorption spectra | A spectrum of dark lines across the pattern of spectral colours colours produced when light passes through a gas and the gas absorbs certain frequencies. |
| Mean Electron Drift | Average velocity that the electrons travel down the material |
| Charge | Current* Time (C) |
| 1 Coulomb | Total charge supplied by a current of one ampere in a time of one second (C) |
| Kirchhoff's First law | The sum of the currents entering a junction = sum of current leaving the junction |
| Electromotive Force (E.M.F.) | The energy transferred per unit charge when one other type of energy is converted into electrical energy (V) |
| Ohms Law | Current is proportional to the P.D provided physical conditions remain constant |
| Resistivity (P) | P=RA/L |
| Kilowatt-hour (kWh) | 1000 Watts for 3600 seconds = 3.6x10(6) |
| Resistance of a Series circuit | R(t)= R(1)+R(2) |
| Resistance of a parallel circuit | 1/R(t)=1/R(1) + 1/R(2) |
| Kirchhoff's second law | In any closed loop in a circuit the sum of the E.M.F = sum of the P.D. |
| Wavelength (Lambda) (m) | The smallest distance between 2 points that have the same pattern of oscillation. |
| Period (T) (s) | The time taken to complete one pattern of oscillation |
| Frequency (f) (Hz) | Number of oscillations per unit time at any point |
| Displacement (x) (m) | The distance any part of the wave has moved from its mean position |
| Amplitude (x) (m) | The maximum displacement |
| Kinetic Energy | Work an object can do by virtue of speed |
| Power | The rate of doing work (W) |
| 1 Watt | 1 joule per second (Js-1, W) |
| Stress | Force per unit cross sectional area (Nm-2, Pa) |
| Strain | Extension per unit length (No Unit) |
| Couple | Pair of equal and parallel but opposite forces. Tends to produce rotation |
| Moment of a Force | Force * Perpendicular Distance from a stated point. (Nm) |
| Density | Mass per unit volume (Kgm-3) |
| Pressure | Force per unit area (Nm-2, Pa) |
| Joule | Work done when a force of 1 N moves its point of application 1 m in the direction of the force (J) |
| Energy | The stored ability to do work (J) |
| Conservation of Energy | Where energy may be transferred from one form to another but cannot be created or destroyed |
| Gravitational Potential Energy | The energy stored in an object by virtue of its position in a gravitational field. (J) |
| Speed | Distance per unit time (ms-1) |
| Displacement | Distance moved in a stated direction (m) |
| Velocity | Displacement per unit Time (ms-1) |
| Instantaneous Speed | Speed at an instant in time (ms-1) |
| Acceleration | Rate of change of velocity (ms-2) |
| One Newton | The force that causes one Kg to have an acceleration of 1ms-1 (Kgms-1, N) |
| Weight | Gravitational force on a body (N) |
| Scalar Quantity | A quantity with just a magnitude |
| Vector Quantity | A quantity with both magnitude and direction |
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