Effect of Voltage on Resonance and Amplitude PLANNINGObjectiveThe aim of the experiment is to study the effect of voltage on resonance and amplitude amplitude of a string. and amplitude. From what I have learned in class and in everyday life, I know that when any string is plucked, it moves back and forth. The movement causes the air molecules around it to vibrate. When it moves fast enough, the vibrations cause a sound to be heard.ResearchResearch has been conducted into the principles on which the experiment is based. The frequency of an oscillation is defined as the number of cycles executed per unit time (Salters Horners Advanced Physics). For a spring is the time it takes to move back and forth once its frequency is reached. Frequency is measured in Hertz (Hz). Each object has its own natural frequency. (Physics for You by KeithJohnson). Resonance occurs when the applied frequency is equal to the natural frequency of the object. Therefore, when the string to be used in the experiment is plucked and the applied frequency is equal to its natural frequency, resonance occurs. The resonant frequency of a string can be increased by: * Shortening the length * Increasing the tension * Using a lighter string. Variables and constants The experiment is primarily concerned with the effect that voltage will have on frequency and amplitude. Therefore, the basic variable will be the tension of the string. The constant in this case would be the thickness of the rope, since it would not change. This should ensure that the experiment is fairly accurate as its thickness can affect resonance. Application of Principles The principles of frequency, resonance and amplitude are widely applied in many engineering projects. Understanding the above principle is essential to ensure that bridges can travel safely..