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Exam Revision - Physics - Coggle Diagram

- - - - W = QV (Work Done = Charge x Voltage)
        
        V(peak) = I(peak) x R (Peak Voltage = Peak Current x Resistance)
        
        V(rms) = I(rms) x R (Direct Voltage = Direct Current x Resistance)
        
        Q = It (Charge = Current x Time)
        
        V = IR (Voltage = Current x Resistance
        
        P = IV = I^2R = V^2/R (Power = Current x Voltage = Current Squared x Resistance = Voltage Squared / Resistance
        
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- - - - Random Uncertainty = (Highest Result - Lowest Result) / No. of Observations
        
        Percentage uncertainty = (Random Uncertainty / Mean Uncertainty) x 100
  - - - Accuracy - Results which are accurate have a mean value very close to the real value.
        Accurate results may be spread over a wide range.
        
        Precision - Results which are precise will be spread over a very small range. This does not mean they will be close to the real value. A result can be precise but not accurate!
        
        SI Units - The International System of Units (SI) states the 7 base units that must be used in all calculations. These are: Second (time), Meter (distance), Kilogram (mass), Ampere (current), Kelvin (temperature), Mole (amount of a substance), and Candela (light intensity). All other units are derived from these 7.
        
        Mean Mean is the type of average used in physics. A mean value of serval results should
        always be found when analysing experiments.
        
        Random - Random uncertainties are present in every experiment. This is the reason that experiments must be repeated.
        
        Scale Reading - The scale reading is the uncertainty that accords because of the scale on the
        device used. These are never completely precise.
        
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