Question

What is the voltage at the 3 ohm resistor? ____V

Answer 1

I don't have the circuit diagram or values needed to give a numeric answer. Can you upload or describe the circuit (battery voltage, how the 3 Ω resistor is connected, other resistor values, and any given currents)?

Meanwhile, here are the ways to find the voltage across a 3 Ω resistor depending on the situation:

1. If you know the current through the 3 Ω resistor:
- Use Ohm’s law: V = I × 3 Ω.

2. If the 3 Ω resistor is in series with other resistors across a known supply V_s:
- Find total R_total = sum of series resistances.
- Current I = V_s / R_total.
- Voltage across 3 Ω: V = I × 3 Ω.
- Or use voltage divider: V = V_s × (3 Ω / R_total).

3. If the 3 Ω resistor is in parallel with other components across a known supply:
- Voltage across it equals the supply voltage (V = V_s).

4. If it’s part of a more complex network:
- Use Kirchhoff’s laws, node-voltage or mesh-current analysis to find the node voltages or currents, then V = I × 3 Ω for that resistor.

Example (series): a 12 V battery with resistors 2 Ω, 3 Ω, and 5 Ω in series:
- R_total = 10 Ω, I = 12/10 = 1.2 A, V_3Ω = 1.2 × 3 = 3.6 V.

Send the circuit or values and I’ll compute the exact voltage.