A 6 volt battery with 1.2 ohms internal...

Question 1 of 27070LuebB949I9sqlJNYb6rk

A 6 volt battery with 1.2 ohms internal resistance is connected across two light bulbs in parallel whose resistance is 12 ohms each. What is the current flow?

Back

Question 1 of 27070

A 6 volt battery with 1.2 ohms internal resistance is connected across two light bulbs in parallel whose resistance is 12 ohms each. What is the current flow?

🔍 Key Concepts

• Equivalent resistance of parallel circuits – how to combine two equal resistances in parallel • Internal resistance of a battery – treat it like another resistor in series with the external circuit • Ohm’s Law (I = V / R) – using total circuit resistance to find total current

💭 Think About

• First, find the combined resistance of the two 12-ohm bulbs in parallel. What is the equivalent resistance of two equal resistors in parallel? • Next, remember that the battery’s internal resistance is in series with the external circuit. How do you add series resistances? • Once you have the total resistance (internal + external equivalent), how do you use the 6 V battery value to compute the total current?

✅ Before You Answer

• Make sure you correctly find the equivalent resistance of the two 12-ohm bulbs (it should be less than 12 ohms). • Confirm that the internal resistance (1.2 ohms) is added in series with the bulbs’ equivalent resistance, not in parallel. • After calculating total current with I = V / R_total, check that your answer is less than 6 amps and greater than 0 amps, then see which choice it’s closest to.