The input energy for the torch to work comes from the chemical energy in the batteries which is changed to electrical energy. The output energy from the torch is light and heat energy.
What are the components of a flashlight?
The Workhorse flashlight consists of two major parts: (a) the body, containing the battery compartment and the switch, and (b) the bulb assembly, containing the reflector, the bulb, and the connector. The flashlight is powered by two 1.5 volt size C batteries.
What are energy inputs and outputs?
Try and focus students on the input energy that is the last energy to enter the device, and the output energy that the device is intended to produce. They can make notes on other kinds of energy that are unintended output energies (often heat and sound).
What is the process of a flashlight?
When the switch of a flashlight is pushed into the ON position, it makes contact between two contact strips, which begin a flow of electricity, powered from the battery. … The reflector redirects the light rays from the lamp, creating a steady beam of light, which is the light you see emitting from the flashlight.
What is the input of a kettle?
In an electric kettle, electrical energy is transformed into thermal energy in the heating element. The thermal energy transfers to the water. When the water boils, a little of the energy is transformed into sound. If a book or other object is on a shelf, it has gravitational potential energy.
What is the output of a flashlight?
The light output of an incandescent lamp in a flashlight varies widely depending on the type of lamp. A miniature keychain lamp produces one or two lumens. A two D-cell flashlight using a common prefocus-style miniature lamp will produce on the order of 15 to 20 lumens of light and a beam of about 200 candlepower.
Which part of the flashlight is the control?
The switch is the component that controls the electricity. Pushing the switch causes the electrical current to activate, thus turning on the flashlight. The current is broken when the switch is pushed to off and this turns off the light.
What is the difference between renewable energy inputs and outputs?
What is the difference between renewable energy inputs and outputs? … For example for solar thermal hot water energy systems, the input is solar radiation energy, while the output is heat, in the form of heated water with not much in between. For photovoltaic systems, the outputs are electrical energy instead.
What are the inputs to natural energy flow?
Energy inputs include (1) thermodynamic data such as specific heats, heats of combustion, enthalpies of phase change, densities, and so on; (2) kinetic rate data; and (3) their state, that is, input and output temperatures.
What is inside a torch?
In most torches, the lamp is either a tungsten filament (incandescent bulb) or a light emitting diode (solid state bulb), also known as an LED. The tungsten filament or LED glows when electricity flows through it, thus producing visible light. Tungsten is a natural element and the tungsten filament is a very thin wire.
Is a flashlight energy efficient?
When electricity passes through the wire, resistance causes it to heat up. This conversion of electricity to heat is the second energy conversion in a typical flashlight. This is done with nearly 100% efficiency.
Is Matter lost or conserved when you use a flashlight?
Batteries can convert stored chemical energy into electrical energy. 5 Electrical energy is the energy of electricity—electrical charges moving through a conductor. … In a flashlight, the electrical energy becomes light energy and thermal energy light bulb. so the answer would be yes It does.
Why is a kettle not 100% efficient?
To be 100% efficient, all the heat generated by the kettle would have to be transferred to the water. That’s not going to happen. The exterior of the kettle will get warm and lose heat to the air. That will result in a drop in efficiency.
How many watts does it take to boil a kettle?
Kettle: around 2p to boil a full kettle: The average kettle holds 1.5 litres of water and uses about 0.1 kWh of electricity to boil for 3 minutes.
What is the input energy of a TV?
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.