Input​ refers to the amount of energy put into a device, and ​ output​ refers to the amount of energy that comes out. For example, a light bulb’s input energy is the form of electrical energy, and its output energy is in the form of light and heat.

Calculate the work input in a pulley by using the previous readings in the correct mathematical equation: Work (W) equals force (f) multiplied by distance (d), or W=fd. The work done by the pulley is the equation of weight (w) multiplied by height traveled (h).

The work efficiency formula is efficiency = output / input, and you can multiply the result by 100 to get work efficiency as a percentage.

While watching TV, electrical energy is the input and light and sound is the output. Example 3: A torch will not work when you turn it on unless it has batteries. The input energy for the torch to work comes from the chemical energy in the batteries which is changed to electrical energy.

Every system has things called ‘inputs’ and ‘outputs’. In your family car, the gasoline in the tank is an energy input to your car. The output of your car is the conversion of this input (gasoline) into motion. When you turn on the car radio, it has two inputs.

In our example input electrical power of the motor is 0.22 A x 6 V = 1.32 W, output mechanical power is 1000 rpm x 2 x 3.14 x 0.00126 N•m /60 = 0.132 W. Motor torque changes with the speed. At no load you have maximum speed and zero torque. Load adds mechanical resistance.

An efficient motor transfers most of this energy as kinetic energy (useful work). Energy is lost as the electric current flows through the motor’s coils. The wire coils have electrical resistance; the greater the resistance, the harder it is for the current to flow and the more energy is wasted.

The Calculation As a standard rule, companies rate the generator output in Watts (W) or KiloWatts (kW). The accepted formula is Watts = Volts X Amps. Therefore, when you purchase a 5kW generator delivering 120 Volts, it can give you an output of 41.67 amps.

You could increase the output voltage of a generator by rotating it faster, increasing the number of turns on the coil or using stronger magnets, The output of the ac. generator is shown in Figure 2.

Steps to Check Your Generator Output

1. Turn on the voltmeter after first starting the generator.
2. While the generator runs, turn on the voltmeter.
3. Ground your meter.
4. There is an alligator clip found on the lead.
5. Attach the red lead to the output plug.

120 volts

For homeowners wanting the ultimate entry-level whole-house standby, a 22kW is a perfect choice to reap all of the benefits of a whole-house generator over a regular home standby. A generator in the 27-36kW range is perfect for most homes since they replace 75% of the 200 amps coming into your electrical panel.