Difficulty: Easy
Correct Answer: 61 mA
Explanation:
Introduction / Context:
In household lighting and basic electronics, bulbs connected in parallel each experience the full source voltage. This problem checks your application of Ohm's law to determine branch current when resistance and applied voltage are known.
Given Data / Assumptions:
Concept / Approach:
Use Ohm's law for a single branch: I = V / R. In a parallel network, branch currents are computed individually because the voltage across each branch is the same as the source voltage.
Step-by-Step Solution:
Verification / Alternative check:
Rough estimation: 100 V across 2 kΩ would give 50 mA; with 110 V and 1.8 kΩ, expect slightly higher than 50 mA, matching ~61 mA.
Why Other Options Are Wrong:
Common Pitfalls:
Final Answer:
61 mA
Discussion & Comments