Objective
to study the transformation of mechanical energy into electrical energy using a bicycle dynamo
Theory
A dynamo is a type of generator that can convert mechanical energy into electrical energy by Michael Faraday. “Inductive current is caused by a change in the magnetic field that passes through a coil.” The dynamo consists of a coil of conductors and a permanent magnet.
Bike dynamo
This is because bicycles do not have lights like a motorcycle or a car with a battery. and from the principle of converting mechanical energy into electrical energy of dynamo therefore can be adapted to bicycles Because when cycling, it will give mechanical energy and then go to spin a dynamo that has a magnet inside. This causes a change in the magnetic field through the coil and an electric current is induced in the coil conductor. According to Michael Faraday's principle, and make any electrical device or light bulb connected to this dynamo shine. The electric current depends on the rotation speed of the spinning. notice the brightness of the light
Experimental equipment
1. 1 bicycle dynamo
2. The spinning wheel connects the belt to the dynamo head.
3. Light bulb with on-off switch
4. Electrical wires connect the dynamo, electric lamp and switch in a circuit.
5. Plug jack with plug
Experimental method
1. Plug the power jack from the bicycle dynamo into the plug that connects to the light bulb and switch as shown in Figure 4.
2. Turn on the power switch, use 1 lamp, then turn the hand wheel, gradually increasing the speed of rotation. and observe the brightness of the lamp and record the results
3. Repeat the experiment in step 2, but turn on the switch of 2 lamps and 3 lamps respectively.
4. Record the results and summarize the results of the experiment.
Summary of experimental results
The rotation speed of the wheel is related to the electric current (the faster it spins, the more current. making it noticeable that the light bulb is brighter)
light bulb brightness In addition to changing with speed in rotation It also changes according to the number of incandescent lamps used, that is, if one light is switched on, the light is brighter than the 2 light switches on, and two light bulbs are switched on, the light is brighter than the 3 light switches on. even more when the rotation speed is constant)
No comments:
Post a Comment