difference between ra = 20 cm to rb = 5 cm? 23.7 The electric field in a region is E = (320- 23 X2 - 670 - x) i . What is the electric potential difference between x1 = 2.3 m and x2 = 4.7 m? 24.1 When charged up to a voltage of 60 V, a particular capacitor contains 142 uC of charge