Question

Which one of the following is correct about the current I through the circuit and
potential difference V across the resistor R, if one increases the number of cells in
the given circuit?
a. V will increase. I will decrease.
b. I will increase. V will decrease.
e. Both I and V will increase
d. Only V will increase and I will remain unchanged.

Answer 1

If we increase the number of cells in the battery then we are basically increasing the potential difference or the voltage provided by the battery. Hence, the Potential difference will increase.

Now, according to Ohm's law, the current is directly proportional to the potential difference applied. Hence, the current will also increase by increasing the number of cells.

Hence, option (c) is correct.

Answer 2

a) v will increase. I will decrease