Power of Electrical Circuit: Practice Problem & Solution

Solution Explained:

To solve this problem, we apply the core principles of Power of Electrical Circuit. Understanding the underlying formula is key to arriving at the correct answer below:

In a series circuit, the current $I$ is the same through both bulbs. Since power $P = I^2 R$, the power dissipated is directly proportional to the resistance. Hence, the ratio is $1 : 2$.