1. What is the Power Formula?

The power formula P = I × V calculates electrical power in watts from current (in amps) and voltage (in volts). This fundamental equation is essential for electrical calculations in the UK standard 230V system.

2. How Does the Calculator Work?

The calculator uses the power equation:

Where:

• \( P \) — Power in watts
• \( I \) — Current in amps
• \( V \) — Voltage in volts (UK standard: 230V)

Explanation: The formula demonstrates the direct relationship between current, voltage, and power in electrical systems.

3. Importance of Power Calculation

Details: Accurate power calculation is crucial for electrical system design, appliance selection, circuit protection, and energy consumption estimation in UK households and businesses.

4. Using the Calculator

Tips: Enter current in amps and voltage in volts. The UK standard voltage is pre-set to 230V. All values must be valid (current > 0, voltage > 0).

5. Frequently Asked Questions (FAQ)

Q1: Why is UK voltage 230V?
A: The UK standardized on 230V to align with European standards while maintaining compatibility with existing 240V systems.

Q2: Can I use this for DC calculations?
A: Yes, the formula P = I × V works for both AC and DC systems, though for AC there are additional power factor considerations.

Q3: What's the typical current for household appliances?
A: Most UK household appliances draw between 0.5-13 amps, depending on their power requirements.

Q4: How does this relate to energy consumption?
A: Energy consumption (in kWh) = Power (in kW) × Time (in hours). This calculator helps determine the power component.

Q5: What's the maximum current for UK sockets?
A: Standard UK sockets are typically rated for 13 amps, protected by a 13A fuse in the plug.