“Used to raise or lower down the potential difference of an alternating current.” The following statement refers to
“Digunakan untuk meningkatkan atau menurunkan beza keupayaan bagi arus ulang alik.” Pernyataan berikut merujuk kepada
PHYSICS KSSM F5: CHAPTER 4.3
Quiz
•
Physics
•
11th - 12th Grade
•
Hard
UMAIR MOHAMAD
Used 97+ times
FREE Resource
10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
“Used to raise or lower down the potential difference of an alternating current.” The following statement refers to
“Digunakan untuk meningkatkan atau menurunkan beza keupayaan bagi arus ulang alik.” Pernyataan berikut merujuk kepada
Transformer
Step-up transformer
Transformer injak naik
Step-down transformer
Transformer injak turun
Eddy currents
Arus pusar
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A _______ is a transformer that does not experience any loss of energy, that is the efficiency, η is 100%
Sesuatu ________ ialah transformer yang tidak mengalami kehilangan tenaga, iaitu kecekapannya, η ialah 100%
Efficient transformer
Transformer cekap
Perfect transformer
Transformer sempurna
Non-ideal transformer
Transformer tidak unggul
Ideal transformer
Transformer unggul
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A transformer that is connected to a 240 V power supply supplies 27 W of power at a voltage of 18 V to an electronic equipment. The electronic equipment’s secondary coil has 60 turns around the transformer. Assuming the transformer is ideal, calculate the number of turns of the primary coil.
Sebuah transformer yang disambung ke bekalan kuasa 240 V membekalkan kuasa 27 W pada voltan 18 V kepada sebuah alat elektronik. Gegelung sekunder alat elektronik itu mempunyai 60 lilitan pada transformer. Andaikan bahawa transformer itu unggul, hitungkan bilangan lilitan gegelung primer.
72 turns
72 lilitan
90 turns
90 lilitan
108 turns
108 lilitan
800 turns
800 lilitan
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A step-down transformer is connected to a 500 V power source and supplies 60 W of power at a voltage of 12 V to a lightbulb. Calculate the current in the secondary circuit.
Sebuah transformer injak turun disambungkan kepada sumber kuasa 500 V dan membekalkan sebanyak 60 W kuasa pada voltan 12 V kepada sebuah mentol. Hitungkan arus dalam litar sekunder.
0.2 A
5 A
8.33 A
41.67 A
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A 40 V power supply is connected to an ideal transformer with 5 turns on the primary coil. The power supply has an input of 10 W. Calculate the current in the primary circuit.
Sebuah bekalan kuasa 40 V disambungkan pada transformer unggul dengan 5 lilitan pada gegelung primer. Bekalan kuasa itu mempunyai input 10 W. Hitungkan arus dalam litar primer.
2 A
1.25 A
0.25 A
0.05 A
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Of the following, which value remains unchanged when a transformer is active?
Antara berikut, nilai apakah yang tidak berubah apabila transformer bekerja?
Voltage
Voltan
Power
Kuasa
Current
Arus
Amount of turns
Bilangan lilitan
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
During an electrical energy transmission, a power station will step-up the voltage. Why is that the case?
Dalam penghantaran tenaga elektrik, stesen kuasa akan injak naik voltan. Mengapakah mereka buat sedemikian?
To decrease the current so that power loss can be reduced
Merendahkan arus agar rendah kehilangan tenaga
To ensure that power loss is reduced when it travels a far distance
Memastikan kehilangan tenaga dikurangkan apabila ia melalui jarak yang jauh
So that the power gets distributed evenly in a populated area
Supaya tenaga dapat dibahagikan dengan sama rata dalam kawasan yang berhuni
To cause less traffic while the electricity travels through the wire
Untuk mengurangkan kesesakan semasa tenaga elektrik bergerak sepanjang wayar itu
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