Table of Contents
What is the input and output energy of a light bulb?
An example is a light bulb where the input is electricity and the useful output is light. However, a large amount of the energy is lost to the surroundings as thermal energy. The efficiency of a system is determined by how much of the input energy is transferred to useful output energy.
Is a light bulb a device?
All of these devices, and many other common devices still in use today, such as light bulbs, vacuum cleaners, and toasters, are known as electrical devices. Electrical devices take the energy of electric current and transform it in simple ways into some other form of energy — most likely light, heat, or motion.
What type of system is a light bulb?
An incandescent light bulb gives only energy of the system in the form of heat. So, it is best considered as closed system.
How is the output of a light bulb different from the input?
The difference is in how much of that energy is output as heat vs the energy output as light. In a standard incandescent light bulb about 10% of the energy is output as light while the other 90% is output as heat. This makes the bulb only 10% efficient.
Which is an example of input and output?
Input refers to the amount of energy put into a device, and output refers to the amount of energy that comes out. A device may change the type of energy but not the amount. For example, a light bulb’s input energy is the form of
What kind of energy does a light bulb use?
device may change the type of energy but not the amount. 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. Efficiency
How are input and output related to efficiency?
Input refers to the amount of energy put into a device, and output refers to the amount of energy that comes out. A device may change the type of energy but not the amount. 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. Efficiency