Ohm.pdf - Physics \u2013 Ohm\u2019s Law Lab Report Research Question To what extent is the Ohm\u2019s Law true with specific regard to the strength the

Ohm.pdf - Physics – Ohm’s Law Lab Report Research...

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Physics Ohm’s Law Lab Report Research Question - To what extent is the Ohm’s Law true with specific regard to the strength the correlation between current and voltage. Overview - The experiment that we have conducted was, made to check whether the Ohm’s law can be replicated, and validate whether and when it can be used in practical situations. Ohm’s law states th at the voltage is proportional to the current flowing through any conduct or at a constant temperature. Where the resistance remains constant. Background Information - Resistance (R) is calculated by V/I , Where V is voltage and I is current. This means that when ‘V’ is increased ‘I’ will proportionally increase, and when ‘V’ is d
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ecreased ‘I’ will proportionally decrease. But it only applies to certain materials which are known as Ohmic resistors, meaning that they follow Ohm’s law, while many others, like lamp filaments, do not. Apparatus 1. Ammeter An Instrument for measuring electric current in amperes. 2. Voltmeter An instrument for measuring electric potential in volts. 3. Rheostat An electric instrument us ed to control a current by vary ing the resistance. 4. Ohmic Resistors Are those re sistors that have constant resistance. In other
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words, that follow the Ohm’s law. If you take such a resistor, apply voltage 2 across it, whilst measuring current and voltage, and then draw a graph of current versus voltage, you get a straight line. 5. Switch A device for making and breaking the connection in an electric circuit. 6. Wires Metal drawn out into the form of a thin flexible thread or rod 7. Battery Eliminator Is any device which prov ides power to a circuit, replacing the need or use of batteries. Variables Independent Variable Current
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Dependent Variable Potential Difference across the resistor Controlled Variables Resistor, Components used in each trial and Temperature. Safety Precautions - All components in this experiment are volatile and overheat extremely quickly. Thus, improper handling can result in damage to both the components and the user, as any mistake could lead to something dangerous like the circuit catching fire and the user being burned, It is essential that the temperatur e of the circuit is managed. Not only is it
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  • Fall '10
  • noris
  • Resistor, Electrical resistance

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