according to my understanding of a resistor , all it does is limit the number of charges flowing according to the potential energy possessed by each unit of charge , as the potential energy / charge * aka volts * increase , their ability to * move in large numbers through resistors * increase . but my teacher says that resistance is * slowing down * charges , its working against their movement through out the wire . does resistance work against every individual charge ? increasing the work needed to conduct it ? in other terms slowing it down ? or does it affect the number of available charge carriers flowing through the conductor ?