Question

What happens if you double the number of batteries used in a circuit? (Assume all of the batteries are the same.)
does the voltage in crease?
does the current increase?
Or both?

Answer 1

It should increase the voltage

Answer 2

Answer:

Both

Explanation:

Let there is one battery in a circuit containing a resistor R. The voltage given by the battery is V and the current through the circuit is given by the Ohm's law

V = I R      

If the number of batteries are doubles, the voltage becomes 2V. As the resistance is constant, the current should also be doubled.

So, voltage and current both increases.