If a transformer reduces voltage, it is called a....................... transformer.

Sekiranya transformer mengurangkan voltan, ia dipanggil transformer .......................

If a transformer increases voltage, it is called a ......... transformer.

Sekiranya transformer meningkatkan voltan, ia dipanggil transformer .........

The winding of a transformer which is connected to a source of energy is called the ....... winding.

Lilitan gegelung transformer yang disambungkan ke sumber tenaga dipanggil lilitan gegelung ....... .

Ahmad charged his hand phone using battery charger.
Charger has a transformer as in the diagram.
What is the number of turns of the secondary coil?

Ahmad mengecas telefon bimbitnya menggunakan
sebuah pengecas bateri. Pengecas mengandungi
transformer seperti dalam rajah.
Berapakah bilangan lilitan gegelung sekunder?
TIPS!!!!
 $\frac{V_P}{V_S}=\frac{N_P}{N_S}=\frac{I_S}{I_P}$  

A transformer has 500 turns on its primary coil and 100
turns on its secondary coil. An a.c voltage of 25 V is
connected across the primary coil.
What is the voltage across the secondary coil?

Sebuah transformer mempunyai 500 lilitan pada
gegelung primer dan 100 lilitan pada gegelung
sekunder. Satu bekalan a.u 25 V disambung merentasi
gegelung primer. Berapakah beza keupayaan
merentasi gegelung sekunder?
TIPS!!!!!!
 $\frac{V_P}{V_S}=\frac{N_P}{N_S}=\frac{I_S}{I_P}$  

Diagram shows a simple transformer. The bulb does

not light up. Which modification will cause the bulb to light up?

Rajah menunjukkan sebuah transformer ringkas. Mentol tersebut tidak menyala. Pengubahsuaian manakah yang akan menyebabkan mentol menyala?

Diagram shows a step up transformer. Which step will increase the efficiency of the transformer?

Rajah menunjukkan transformer injak naik. Langkah manakah yang akan meningkatkan kecekapan transformer itu?

 $\frac{V_P}{V_S}=\frac{N_P}{N_S}$  

The Diagram shows the number of turns in the pair
of output terminal of a transformer. Which output terminal pair, the output voltage is 12V?

Rajah menunjukkan bilangan lilitan pada pasangan
terminal output suatu transformer. Pasangan terminal
output yang manakah, voltan output adalah 12V?

 $Efficiency,\ kecekapan\ =\ \frac{Po}{Pi}x\ 100\%\ =\ \frac{V_SI_S}{V_PI_P}\ x\ 100\%$  

When a transformer with its primary coil is connected
to a 240V a.c. supply, the current in the primary and
secondary coil is 12A and 5A respectively. If the
transformer is 80% efficient, what is the output voltage
of the secondary coil?

Bila sebuah transformer dengan gegelung primernya
disambung kepada bekalan arus ulang alik 240 V, arus
yang mengalir di dalam gegelung primer dan gegelung
sekunder ialah 12A dan 5A masing-masing. Jika
transformer ialah 80% cekap, berapakah voltan output
gegelung sekunder?