Measuring t-half uncertainty The voltage across a resistor (R) in an RC circuit is displayed on an oscilloscope as shown in the first graph below - Voltage (y-axis) vs time (x-axis). In the second graph, the sweep time settings have been adjusted (reduced by a factor of 10) and only the first part of the trace is displayed, so the time constant can be determined accurately and the uncertainty reduced. The sweep time (x-axis) settings are: 2 μs/Div What is the uncertainty in the measurement of t₁/2? (Give your answer in us to one decimal place. It is not necessary to specify units.)