Category: Physics
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The high voltage transmission
In high Voltage transmission, Power stations usually generate an alternating current a.c at a voltage between 11KV and 25KV. The power generated is then stepped up to 132KV-400KV so that it can be transmitted to long distances from the power station.
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Domestic wiring
Domestic wiring refers to electrical connections and setups done in order to allow use of electric powers supplied by electric power providers to the consumers.
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Induced Electromotive Force(E.M.F)
Through careful experiments, Scientist Michael Faraday discovered that a wire capable of conducting electric current produces some current when it is made to move through magnetic field.
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Magnetic field patterns for a straight conductor
Experiments have shown that magnetic fields created by a current moving through a straight conductor forms concentric circles around the conductor.
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The Electric Motor
An electric motor is a device that converts electrical energy into rotational kinetic energy . A Simple d.c motor consists of a coil of insulated wire between two poles of a magnet as shown in figure below.
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Deriving the lens formula
The lens formula is an equation that shows the relationship between the focal length of the mirror, the image distance and the object distance. The object distance usually determines the image distance but the lens formula also suggests that, focal length determines what image should formed on the screen.
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Hans Oersted: Effect of Magnetic field on current
This discovery has led scientists to always interfere magnetic field with electric fields causing development of many devices that has become very instrumental in human life. These devices includes electric motors, loud speakers, coil meter, circuit break, magnetic tapes, electric motors etc.
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Linear Motion Equations: Detailed Derivation and Applications
Linear Motion is about bodies moving along a straight line even if it is through very short distance. Consider a body moving along a straight line accelerating uniformly from velocity u to final velocity v within time t.
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Hans Christian Ørsted (1777-1851) : Interests and discoveries
Hans Christian Ørsted (1777-1851) was a Danish physicist and chemist who discovered that electric currents create magnetic fields, leading to the concept of electromagnetism.
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Magnetism: 5 Properties and principles
Magnetism is the study of magnets and it’s properties. A magnet is a piece of iron that attracts objects made of iron families towards it. A magnet can be either natural or a piece of iron core that becomes a magnet because of an electric current passing through it.
