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Investigate the current - voltage relationship for a resistor and filament lamp. To determine whether each obeys ohms law.
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| Submitted: Wed Apr 07 2004
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ELECTRICITY Task 1 Aim: To investigate the current - voltage relationship for a resistor and filament lamp. To determine whether each obeys ohms law. Ohms law states that the current through a conductor is proportional to the potential difference across it provided that there is no change in temperature. It is given by the formula V = IR Method: * The circuit is set up as above, the power supply needs to be set at about 4V. The first experiment will be carried out with the filament lamp. * Electrons in a circuit move from the negative terminal to the positive terminal, during which energy can be lost through components causing a difference in the electrical potential energy between the negative and positive terminals. This is called the potential difference and is measured with a voltmeter. The voltmeter is connected in parallel with the component, to measure the voltage going through it. * The ammeter measures the...
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