3.4.3 Electrical Energy and Power 3 – Electrical Energy Consumption (M)
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Question 1 of 3
1. Question
1 point(s)Sebuah pemanas elektrik yang mempunyai kuasa 3600W digunakan untuk memanaskan air selama 15 minit. Jika kos 1 unit (kilowattjam) penggunaan tenaga ialah 22 sen, berapakah kos bagi proses pemanasan ini?
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Question 2 of 3
2. Question
1 point(s)Jika TNB mengenakan 22 sen untuk setiap kWh tenaga elektrik digunakan, kira kos keseluruhan menggunakan cerek elektrik 3kW selama 20 minit dan mentol benang 100 W selama 5 jam.
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Question 3 of 3
3. Question
1 point(s)Satu motor elektrik mengangkat jisim 20kg ke ketinggian 5m dalam masa 10s. Diberi motor elektrik ini disambungkan kepada sumber kuasa 40V dan arus 2A. Cari kecekapan motor tersebut.
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