A student builds a simple circuit with a single resistor with resistance RRR and measures an electric potential difference \Delta VΔVdelta, V across the resistor. Then, the student replaces the resistor with a new one of resistance \dfrac{R}{2} 2
R
​
start fraction, R, divided by, 2, end fraction and keeps the electric potential difference the same.
What is the current I_2I
2
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I, start subscript, 2, end subscript through the new circuit in terms of the original current, I_1I
1
​
I, start subscript, 1, end subscript?