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Find out how resistivity changes as the length of wire is changed, and to find out the resistivity of a certain unknown wire.
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| Submitted: Tue Feb 24 2004
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RESISTIVITY COURSEWORK Section A- Plan Aim To find out how resistivity changes as the length of wire is changed, and to find out the resistivity of a certain unknown wire. Equipment * Power Pack * Ammeter * Voltmeter * Crocodile clips * Wire * Metre rule * Thermometer Method 1. Measure the diameter of wire using a micrometer, taking measurements in 3 different places along wire and take an average. 2. Take a piece of wire which is 100cm long, and attach t a metre rule. 3. Connect up wire to a power Pac, ammeter and voltmeter using crocodile clips and wires, to produce a circuit. 4. Vary the length of wire used in circuit by moving croc clips along the wire at 10cm intervals. 5. Record in a table the voltage and current for each of the 10cm intervals. 6. Find the resistance of wire for each recorded length, using the formula R= V/I 7. Repeat the whole method 3 times and find the average resistance of...
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