1. a) The potential difference in moving from positiona to position b (Vab) in the diagram below is equal to +400 V. Determine the size and polarity of the charge Q. (3 marks)
b) A positive charge q is now at the midpoint between a and b, as shown in the diagram below.
You are told to move charge q a distance of 1.0 m so as to cause the greatest increase in its electrical potential energy. In which direction do you move it? (1 mark)
A. 1 B. 2 C. 3 D. 4
2. A proton, accelerated from rest through a potential difference of 1.2 ×104 V, is directed at a fixed 5.0 ×10-6 C charge.
a) What is the speed of the proton as it leaves the parallel plates?(4 marks)
b) What is the distance d from the fixed charge when the proton is stopped?(3 marks)
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