Best Physics Tuition in Singapore

Physics Tuition classes in Miracle Learning Centre is very beneficial. If you do not understand Physics, you must definitely try the physics tuition class at Miracle Learning Centre.

How to Make a Simple Electric Motor

Energy comes in many forms. Electric energy can be converted into useful work, or mechanical energy, by machines called electric motors. Electric motors work due to electromagnetic interactions: the interaction of current (the flow of electrons) and a magnetic field.

Materials

D battery Insulated 22G wire 2 large-eyed, long, metal sewing needles (the eyes must be large enough to fit the wire through) Modeling clay Electrical tape Hobby knife Small circular magnet Thin marker
Procedure
Starting in the center of the wire, wrap the wire tightly and neatly around the marker 30 times.
Slide the coil you made off of the marker.
Wrap each loose end of the wire around the coil a few times to hold it together, then point the wires away from the loop, as shown:

What is this? What is its purpose?

Ask an adult to use the hobby knife to help you remove the top-half of the wire insulation on each free end of the coil. The exposed wire should be facing the same direction on both sides. Why do you think half of the wire needs to remain insulated?

Thread each loose end of the wire coil through the large eye of a needle. Try to keep the coil as straight as possible without bending the wire ends.

Lay the D battery sideways on a flat surface
Stick some modeling clay on either side of the battery so it does not roll away.
Take 2 small balls of modeling clay and cover the sharp ends of the needle.
Place the needles upright next to the terminals of each battery so that the side of each needle touches one terminal of the battery.

Use electrical tape to secure the needles to the ends of the battery. Your coil should be hanging above the battery.
Tape the small magnet to the side of the battery so that it is centered underneath the coil.

Give your coil a spin. What happens? What happens when you spin the coil in the other direction? What would happen with a bigger magnet? A bigger battery? Thicker wire?

How does a Crane Work?

Welcome back to your physics tuition. Every one of you must have seen a crane. It is present on construction sites of buildings, bridges, roads and so on. It is primarily used to lift heavy loads from some place to another. Do you know how it can lift such heavy weights? Why not ask this question in your physics tuition class and your physics tuition teacher will more than happy to give you the answer. A crane is a machine that can lift and move heavy loads. It is mainly used in the construction of buildings and bridges and in the handling of large weights. Its name comes from its resemblance to crane bird which has a long neck.

Although crane has been in use since ancient times, their widespread use only started in the 19th century with the development of steam engines, internal combustion engines and electric motors.
Basically the cranes are of two types: fixed and mobile. The mobile cranes are more common. Some have a jib or boom that can move up and down, and can swing around in a circle or slew. Some other forms a bridge and can lift up and down, move it along a track, and move it from side to side above the construction site.

A common crane is a crawler. It is mounted on a vehicle with wheels. These cranes are mainly used for civil engineering and construction work. They can lift heavy loads up to around 80 metric tons (72 tons) and can have a boom length of 30 m (100 ft) or more.

We hope you enjoyed this lesson from physics tuition. We will be back with more such interesting findings in our next physics tuition.

How can sunlight be converted into mechanical energy?

Welcome back to your physics tuition. We all know about the vast energy present inside the sun and that are present in sunlight. Do you know how it can be converted into mechanical energy? Why not ask this question to your physics tuition and your physics tuition will more than happy to give you the answer.

The sun is the biggest source of heat and light energy for us. The life exists on the earth mainly because of the sun. Today, scientists are engaged in developing new techniques through which solar energy can be utilized for the benefit of mankind.

Experiments have shown that solar energy falls on certain metals like potassium and silicon electrons are emitted from their surfaces. These electrons are known as photoelectrons and this phenomenon is called the photoelectric effect. Photoelectrons so emitted can be used to produce electric currents.

Photoelectric effect has been used for the construction of solar energy. A solar cell, in fact, is a device that directly converts solar energy into electric energy. These wafers of silicon element are used for making solar cells. Generally a 4 cm long, 2 cm broad and 0.14 mm thick silicon wafer is used for one solar cell. When sunlight falls on this wafer it gets converted into electrical energy. Each solar cell is capable of producing about one half volt of electricity.

To produce useful quantities of electric current, it is necessary to link together a great number of cells. The cells are joined together in big panels and are placed in sunlight. A panel of about 20,000 solar cells can produce 500 watts of electric power. The electricity produced may be used either immediately or to charge electric storage batteries for later use. Materials like cadmium sulfide and gallium arsenide are also being used for making solar cells.

Solar cells have several different uses. In sunny places, solar panels are used to provide boost power to telephone signals etc. Spacecrafts, space-laboratories and smaller satellites have a large number of solar cells to provide power for their transmitters and other scientific equipment.

Scientists are trying to develop better solar cells. In India, Bharat Heavy Electricals Ltd and Central Electronics Ltd are making solar cells which are being used for different applications. We hope you enjoyed this lesson from physics tuition. We will be back with more such interesting findings in our next physics tuition.