If the resistance is halved and the voltage stay the same, what is the currents?

The current would be doubled.

Explanation:

As per Ohm's Law:

We know,

V=

where,

V=Voltage across the substance,

I-current through the substance,

R-Resistance of the substance.

Let initially,

V=;

Using Ohm's law,we get,

  (Equation 1)

Afterwards it is given that Voltage is same and Resistance is halved.

Therefore (assuming final voltage,current and resistance are respectively)

" alt="R_{f}=\frac{R_{0} }{2}" />" />;

Using Ohm's law,we get

Using Equation 1, we get,

Therefore the current is doubled.

c) should be the answer.

answer; 4 electrons;