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Transcript
Investigating the current through a resistor at constant temperature Apparatus: Draw and label the diagram of the circuit used for the investigation in the box below. List all the equipment used: 12 V generator ........................... ........................... Ammeter .......................... My prediction: I predict that the current through the r___________ at c___________ temperature will vary with the v__________ in a ……… (tick your prediction below) Directly proportional way Indirectly proportional way Procedure (what we will do): After connecting the circuit as in the diagram we vary the o_______ voltage of the g_________. Then we read the voltage a________ the resistor on the v__________ and the c__________ flowing through the resistor on the a__________ and we record them in the table (next page). For each reading of these two variables we can work out the value of the resistance by using the formula (Ohm’s Law): Resistance (Ohms) = _________________ If the resistance stays the same at every change of the voltage our graph will show a straight line, which means that the current is d_________ p___________ to the voltage for a resistor at c___________ temperature. Table of results: Voltage (V) Current (A) Resistance (Ohms) Graph: Choose the appropriate graph to represent the data in the table. Line or Bar graph? Conclusion: My prediction was right/wrong (circle the appropriate one) because ________________ __________________________________________________________________ I could improve the investigation by _______________________________________ __________________________________________________________________
