Question
In the circuit, $\mathscr{E}=45.0 \mathrm{V}$ and $R=100.0 \Omega$. Assumethe emf is ideal. If a voltage $V_{x}=30.0 \mathrm{V}$ is needed for a circuit, what should resistance $R_{x}$ be?
Step 1
Step 1: We know that the voltage across a resistor in a series circuit is given by Ohm's law, which states that $V = IR$, where $V$ is the voltage, $I$ is the current, and $R$ is the resistance. Show more…
Show all steps
Your feedback will help us improve your experience
Narayan Hari and 83 other Physics 102 Electricity and Magnetism educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
Consider the circuit shown in E26.17, the voltage across the $2.00-\Omega$ resistor is 12.0 $\mathrm{V}$ . What are the emf of the battery and the current through the $6.00-\Omega$ resistor?
What is the emf $_{\mathrm{X}}$ of a cell being measured in a potentiometer, if the standard cell's emf is 12.0 $\mathrm{V}$ and the potentiometer balances for $R_{\mathrm{x}}=5.000 \Omega$ and $R_{\mathrm{s}}=2.500 \Omega$ ?
Transcript
Watch the video solution with this free unlock.
EMAIL
PASSWORD