Sains PT3 Penghantaran dan Pengagihan Tenaga Elektrik

Sains PT3 Penghantaran dan Pengagihan Tenaga Elektrik

Assessment

Assessment

Created by

Mohd Hanis

Other, Other

12th Grade

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10 questions

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1.

Multiple Choice

2 mins

10 pts

Why is alternating current used instead of direct current in the transmission of electricity through long distances?

Mengapa arus ulang alik digunakan dan bukan arus terus dalam penghantaran elektrik jarak jauh?

Only alternating current can flow through the cables.

Hanya arus ulang alik boleh mengalir melalui kabel.

Alternating current voltage can be stepped up or stepped down by using transformers.

Arus ulang alik boleh diinjak naik atau diinjak turun dengan menggunakan transformer.

Most of the electrical appliances work only with alternating current.

Kebanyakan peralatan elektrik dapat berfungsi hanya dengan arus ulang alik.

Generating direct current is more complicated than generating alternating current.

Penjanaan arus terus adalah lebih rumit daripada penjanaan arus ulang alik.

2.

Multiple Choice

30 sec

10 pts

In the transmission of electricity through cable, the energy loss is directly proportional to

Dalam penghantaran elektrik menerusi kabel, kehilangan tenaga adalah berkadar terus dengan

the radius of the cable.

jejari kabel.

the resistance of the cable.

rintangan kabel.

the current flowing in the cable.

arus yang mengalir dalam kabel.

3.

Multiple Choice

30 sec

10 pts

The function of the transformer in the transmission of electricity is to

Fungsi transformer dalam penghantaran elektrik ialah untuk

increase the resistance.

menambahkan rintangan

change the voltage.

menukar voltan.

reduce the time to transmit the electricity.

mengurangkan masa untuk menghantar elektrik.

increase the power.

menambahkan kuasa

4.

Multiple Choice

30 sec

10 pts

The efficiency of transmitting electrical power by cable through great distance can be improved by

Kecekapan penghantaran kuasa elektrik menggunakan kabel melalui jarak yang besar boleh ditingkatkan dengan

lowering the voltage and using thick cable.

turunkan voltan dan gunakan kabel yang tebal.

lowering the voltage and using big current.

turunkan voltan dan gunakan arus yang besar.

increasing the voltage and using thin cable.

tambahkan voltan dan gunakan kabel yang nipis.

increasing the voltage and using thick cable.

tambahkan voltan dan gunakan kabel yang tebal.

5.

Multiple Select

30 sec

10 pts

The power loss can be reduced by (Choose 3):

Kehilangan kuasa dapat dikurangkan melalui (Pilih 3) :

Reducing the resistance of the cables

Pengurangan rintangan pada kabel

Reducing the current in the cable

Pengurangan arus elektrik dalam kabel

Reducing the voltage in the cable

Pengurangan voltan dalam kabel

Increasing the voltage in the cable

Meningkatkan voltan dalam kabel

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