Mission control needs a precise current through the resistor. Choose the potential difference from the cell and the resistance, predict the reading, then close the switch. The ammeter obeys I = V divided by R, so doubling the resistance halves the current, while doubling the voltage doubles it. The resistor is kept at a steady temperature, so its resistance does not change.
MissionMake the ammeter read 1.0 to 1.2 A through the resistor.Round 1Streak 0Best 0