Determine the acceleration of a proton in a uniform electric field of intensity 500 N C⁻1. By how much is this acceleration greater than the acceleration due to gravity?
a) 5×10¹⁵ m/s²
b) 5×10¹⁴ m/s²
c) 5×10 ¹³ m/s²
d) 5×10¹² m/s²