GUESS+THE+RESISTANCE+ACTIVITY

Back to HOME > IGCSE PHYSICS > ELECTRICITY > ENERGY AND PD Use the [|PHET AC CIRCUIT CONSTRUCTION KIT] Connect a simple circuit with voltmeter and ammeter as shown:


 * 1) Set the value in ohms of the resistor at a whole number value between 10 and 100 ohms (but keep it a secret).
 * 2) Vary the voltage V in volts of the battery and record it with the current I in amps (see table below).
 * 3) Try to identify a connection between V, I and the resistance and then look at the results of other students and try to predict their secret resistance (you may use a calculator).
 * 4) Plot a graph of V (vertical) against I (horizontal) and calculate the gradient. Is this a more accurate way to find the resistance?