Question

what happens to the current across a circuit when the voltage is doubled while the resistance is held back ​

Answer 1

The current is directly proportional to the voltage and inversely proportional to the resistance. So doubling or tripling the resistance will cause the current to be one-half or one-third the original value

Answer 2

Since the current is inversely propotional to its resistance, when the voltage is doubled the current will be one-half