I don't think Ekmax= hf - workfunction 6 marker question will come us because the textbook says 'the details of this experiment are not required for your AS exam'
Think of terminal pd as = voltage (IF NO INTERNAL RESISTANCE) Same thing in that scenario. If there is internal resistance however then terminal pd is = voltage to circuit AFTER lost volts on internal resistance.
So if internal resistance is higher than terminal pd is changing and is lower.
how they got the graph would be a start when resistance isn't even a factor but that's what they're changing ahh
Your changing the resistance so you can get different currents and voltages, so resistance can be plotted where the internal resistance is the gradient of the line.
how they got the graph would be a start when resistance isn't even a factor but that's what they're changing ahh
voltmeter is not measuring lost volt. it is measuring the voltage at the resistor. however, as the current increases, the lost volt inside the battery also increases so the pd across battery terminal decreases. and therefore, the voltmeter reads lower value of voltage at the resistance. Again, this is because more voltage is being used up in the battery (increase in lost volt). Did you get this?