Internal Resistance of a Dry Cell

Physics Experiment Internal Resistance of a switch Cell May 16, 2009 Written by Daniel Chiuchiarelli 1. content Contents ambit Aim Equipment Method Results Discussion Conclusion 2. Background Ohms police force, a law that applies to galvanical circuits, states that if the temperature or subway of a device is constant, and an galvanic current is sent by it, then the current silky through will be directly proportional to the electric potential across it. In mathematical terms, I ∝ V. From this relation, the code V=IR was derived, where V is the electric potential, I is the current, and R is the resistance. E genuinely component of an galvanic circuit offers some touchstone of resistance when an electrical tear passes through it. Components such as light bulbs, resistivitys and motors all determine the flow of current, and components such as wires and batteries, which are considered to have a theoretical resistance of 0, in reality, h ave a very small level of resistance. By calculating the potential several(predicate) and current across a component, we are able to count on the resistance due to Ohms law. 3. Aim To measure the sexual resistance of a fresh and a flat dry-cell battery. 4.

Equipment big businessman pack Voltmeter Ammeter SwitchConnecting wires Rheostat Dry-cell batteries 5. Method An electrical circuit was throne up with one battery as the power source, including an ammeter, switch and variable resistor (rheostat) in series. A voltmeter was set up in parallel with the battery. The variable resistor was adjusted until the a mmeter gave a reading of approximately 1.5 A! . The switch was closed, and the values on the ammeter and voltmeter were have as fast as possible, in order to forefend the resistor heating up. The variable resistor was adjusted through 4 or 5 different resistors, and 4 or 5 voltage and current measurements were recorded. The experimental data was plan and analysed....If you indigence to get a full essay, order it on our website: BestEssayCheap.com

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