A voltmeter P, which is analogue and has not been calibrated, is connected in parallel with a second voltmeter Q that is known to be accurately calibrated. Readings from both meters are recorded over a range of potential difference (p.d.) values. The diagram displays the calibration graph obtained. From the graph, meter P is shown to have a zero error. The meter is then adjusted so that this zero error is removed. When the meter is recalibrated, the gradient of the calibration graph is found to remain unchanged. What is the new scale reading on meter P when it is used to measure a p.d. of $5.0\,\text{V}$?
- A6.6
- B6.7
- C7.2
- D7.4