⚡ Profession · Electrical Engineering & Trade
Electrician, Wireman & Electronics Bench
Ohm’s Law calculations (V=IR), Joule/Watt energy conversions, electric power (P=VI), wire length scaling, and circuit safety.
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Electrical Engineering
Electric Power Law (P = V × I)
Power (Watts) = Voltage (Volts) × Current (Amperes)
Target Output: Power (P)[SOLVED]
1500
Rate of electrical energy transfer
Electrical potential difference
Flow of electric charge
💡 What This Is Useful For: Sizing household circuit breakers, selecting resistor power ratings to prevent heat failure, calculating EV charger draw, and designing solar battery banks.
📐 Real-World Worked Example: A 120 V household circuit powering a 1500 W space heater draws: I = 1500 / 120 = 12.5 Amperes. (Requires a standard 15A or 20A breaker).
Electrical Engineering
Ohm’s Law (V = I × R)
Voltage (Volts) = Current (Amperes) × Resistance (Ohms)
Target Output: Voltage (V)[SOLVED]
3
VPotential difference across component
Current through component
Electrical resistance
💡 What This Is Useful For: Designing printed circuit boards (PCBs), choosing current-limiting resistors for LEDs, and testing automotive sensors.
📐 Real-World Worked Example: To power a 2.0 V, 20 mA (0.02 A) red LED from a 5.0 V microcontroller pin: Required voltage drop is 5 - 2 = 3 V. Resistor R = 3 / 0.02 = 150 Ohms.
Power Converter
W
kW
0.001
Display Mode:
Formula: 1 W × (1 / 1000) = 0.001 kW
🔍
Sense of Scale: 1 Joule per second; power consumption of a modern energy-efficient LED bulb (~9 W)
Omni-Table (All Power Units for 1 W)7 units computed
| Unit Name | Symbol | Converted Value |
|---|---|---|
| Watt | W | 1 |
| Kilowatt | kW | 0.001 |
| Megawatt | MW | 1.000000e-6 |
| Gigawatt | GW | 1.000000e-9 |
| Mechanical Horsepower | hp (I) | 0.00134102 |
| Metric Horsepower (PS) | PS | 0.00135962 |
| BTU per Hour | BTU/h | 3.41214164 |
Energy & Work Converter
J
kJ
0.001
Display Mode:
Formula: 1 J × (1 / 1000) = 0.001 kJ
🔍
Sense of Scale: Energy required to lift a medium apple (100 g) 1 meter vertically
Omni-Table (All Energy & Work Units for 1 J)5 units computed
| Unit Name | Symbol | Converted Value |
|---|---|---|
| Joule | J | 1 |
| Kilojoule | kJ | 0.001 |
| Kilocalorie / Food Calorie | kcal | 0.00023901 |
| Kilowatt-Hour | kWh | 2.777778e-7 |
| Electron-Volt | eV | 6.241509e+18 |
Length Converter
m
km
0.001
Display Mode:
Formula: 1 m × (1 / 1000) = 0.001 km
🔍
Sense of Scale: Base SI unit; 1 m ≈ distance light travels in 1/299,792,458 s
Omni-Table (All Length Units for 1 m)16 units computed
| Unit Name | Symbol | Converted Value |
|---|---|---|
| Meter | m | 1 |
| Kilometer | km | 0.001 |
| Centimeter | cm | 100 |
| Millimeter | mm | 1000 |
| Micrometer | µm | 1000000 |
| Nanometer | nm | 999999999.9999999 |
| Angstrom | Å | 1.000000e+10 |
| Picometer | pm | 1.000000e+12 |
| Inch | in | 39.37007874 |
| Foot | ft | 3.2808399 |
| Yard | yd | 1.0936133 |
| Mile | mi | 0.00062137 |
| Nautical Mile | NM | 0.00053996 |
| Astronomical Unit | au | 6.684587e-12 |
| Light Year | ly | 1.057001e-16 |
| Parsec | pc | 3.240779e-17 |
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Scientifically reviewed by:D Yap, MBiochem (Oxon), DIC, PhD (Lond)
Clinical Medicine Research Scientist · LinkedIn Profile ↗
⚠️ Research Reference Notice: For reference and research education only. Reviewer is a clinical medicine research scientist and not a practicing physician or veterinarian, and does not provide clinical certification or medical advice. Experimental drug doses and clinical measurements must be verified against institutional protocols, primary manufacturer labeling, and physician orders.