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What is the formula for calculating power in an electrical circuit?

Practice Questions

Q1
What is the formula for calculating power in an electrical circuit?
  1. P = V / I
  2. P = I * R
  3. P = V * I
  4. P = R / V

Questions & Step-by-Step Solutions

What is the formula for calculating power in an electrical circuit?
  • Step 1: Understand that power (P) is the amount of energy used in a circuit.
  • Step 2: Know that power is measured in watts (W).
  • Step 3: Identify the two important components: voltage (V) and current (I).
  • Step 4: Remember that voltage (V) is the electrical force that pushes the current through the circuit.
  • Step 5: Understand that current (I) is the flow of electric charge in the circuit.
  • Step 6: Use the formula P = V * I to calculate power.
  • Step 7: Plug in the values for voltage (V) and current (I) into the formula.
  • Step 8: Multiply the voltage by the current to get the power in watts.
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