A student built Circuit X and Circuit Y shown in Figure 10. The components used in each circuit were identical.

How would the reading on the ammeter in Circuit Y compare to the reading on the ammeter in Circuit X?

1. Compare Circuit X and Circuit Y. Circuit X has one lamp. Circuit Y has two identical lamps connected in series. 2. Recall the rule for resistance in a series circuit: the total resistance is the sum of the individual resistances (R_total = R1 + R2). 3. How does the total resistance of Circuit Y compare to Circuit X? 4. Recall Ohm's Law: Current (I) = Potential Difference (V) / Resistance (R). The potential difference (V) from the battery is the same in both circuits. 5. If the resistance (R) in Circuit Y is higher, what will happen to the current (I)?