By Ohm's Law, we can relate current, voltage and resistance. It is expressed as V=IR. That is, there is a direct relationship between voltage and resistance and voltage and current.
V = IR V1/2V1 = I1R1 / I2R1/4 1/2 = 4I1/I2 I2 = 8I1
Therefore, <span> it will increase by a factor of 8. Hope this answers the question.</span>