How to Delete iPhone Favorites. 1  Tap the Phone app on the iPhone's home screen. 2  Tap the Favorites icon at the bottom left. 3  Tap the Edit button in the top left. 4  A red icon appears next to each favorite in the list. 5  Tap the red icon for the Favorite you want to delete. Tap the Phone app on your iPhone's home screen. 2  Tap the Favorites icon at the bottom left. 3  Tap the Edit button in the top left. 4  Tap and hold on the three-line icon at the far right of the person's name.
Potential difference with respect to electric field is called as the voltage. 3. Voltage is measured in Volts (V) and unit of measuring potential difference is changed with the type of the energy field (V for electric, J/kg for gravitational etc).
Lab 5: Measuring Potential Difference and Current. The goal of this lab is to 1) learn how to set up a circuit. 2) Learn how to measure the current and the potential difference using a multimeter 3) investigate the relationship between V, I and R. You will: 1  Create a circuit consisting of three resistors in series.