In figure "A" of the illustrated circuit,...

Study

Question 1 of 205eccefa3bacbc34ba4d47f12

In figure "A" of the illustrated circuit, with the switch closed what is the resistance of R2 if the total current is .75 amps, the source voltage is 12 VDC and the resistance of R1 is 24 ohms? See illustration EL-0019.

Back

Question 1 of 20

5eccefa3bacbc34ba4d47f12

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

• Use Ohm's Law to find the total resistance from the given source voltage (12 VDC) and total current (0.75 A). • Recognize from the illustration that R1 and R2 are in parallel, so they both have the same voltage across them. • Apply the parallel resistance formula that relates total resistance to R1 and R2.

💭 Think About

• From the total current and source voltage, what is the equivalent (total) resistance of the parallel combination? • With R1 known and the total equivalent resistance known, how can you rearrange the parallel resistance formula to solve for the unknown R2? • Once you calculate R2, which of the multiple-choice options matches your result?

✅ Before You Answer

• Confirm that R1 and R2 are indeed in parallel, not series, by tracing the circuit paths in figure A. • Carefully compute the total resistance using ( R_T = \frac{V}{I} ) with correct units. • When using the parallel formula ( \frac{1}{R_T} = \frac{1}{R_1} + \frac{1}{R_2} ), double-check your algebra when solving for R2.

👋 Hi! I'm Genie, your AI study assistant. How can I help you with this question?

Quick actions

— No credit card needed