- Ohm's Law states that the current through a conductor between two points is directly proportional to the voltage across the two points and inversely proportional to the resistance between them. Mathematically, V = I × R.
- Current = Voltage / Resistance = 5 V / 10 Ω = 0.5 A.
- Voltage = Current × Resistance = 0.015 A × 2200 Ω = 33 V.
- Current = Voltage / Resistance = 12 V / 5 Ω = 2.4 A.
- Total voltage = 3 V + 12 V = 15 V; Current = 15 V / 1000 Ω = 0.015 A or 15 mA.
- Total resistance = 3 Ω + 3 Ω = 6 Ω; Current = 5 V / 6 Ω ≈ 0.833 A.
- For constant voltage, as resistance increases, current decreases (inversely proportional).
- Resistance = Voltage / Current = 50 V / 10 A = 5 Ω.
- Voltage drop across LED = 5 V, so voltage across resistor = 12 V - 5 V = 7 V; Resistance = 7 V / 0.003 A ≈ 2333.33 Ω.
- Equivalent resistance of two 6 Ω resistors in parallel = (6 × 6)/(6 + 6) = 3 Ω; Current = 10 V / 3 Ω ≈ 3.333 A.
Parent Tip: Review the logic above to help your child master the concept of ohms law practice worksheet.
