The diagram below shows a prototype board set up for the measurement of current:
Note that the current must flow through the ammeter in order to reach the circuit.
Take a reading of the current with the link wire to 0 V in position A. Write down the current value you observe:
Take new readings after moving the link to positions B, C and D:
Don't forget to write in the measurement units of your answer.
As the resistance is reduced, current increases. Calculate the current expected in each case using the formula:
Small variations, up to ±5%, can be attributed to the tolerance of the