SMK Datuk Menteri SAINS PMR

Sunday, 10 July 2011

Transformer ...

Kegunaan transformer adalah untuk meniggikan atau merendahkan voltan ke masukan ulang alik kepada satu nilai yang diperlukan sebelum dihantar ke peringkat yang lain . Di samping itu juga , ia berfungsi untuk mengasingkan sesalur ( mains circuit ) dengan litar bekalan ( supply circuit ) . Kadangkala transformer bertindak sebagai alat penjodohan ( coupling ) , iaitu membolehkan pemindahan tenaga elektrik dari satu litar elektrik yang lain dengan menggunakan urat daya magnetic yang berubah – uibah sebagai penyambung antara kedua – duanya

Transformers / Alat Ubah

Transformers / Alat Ubah
1.Transformer are used to convert between high and low voltages and accordingly between low and high currents.
2.A transformer usually has two electrical conductor called the primary coil and the secondary coil.
3.Primary coil is connected to the alternating electric current.
Secondary coil is connected to the output.

4.The electrical power is delivered from primary coil to the secondary coil:
4a.The primary coil will creates a varying magnetic field around the conductor when alternating electric current is fed through it.
4b.The secondary coil, which placed in the varying magnetic field will produce electric current.

Alternative sources of energy / Sumber Tenaga Alternatif

Geothermal power
1.Geothermal energy comes from heat energy buried beneath the surface of the earth.
2.The heat rises close to the surface of the earth, is used to heat the underground water into steam, which can be tapped for used in steam-turbines plants.

Solar power
Solar power is derived from the energy of the sun
Solar-thermal electric generators use the radiant energy from the sun to produce steam to spin the turbines