8180627
Beschreibung
Quiz von Nursultan Zhakupov, aktualisiert more than 1 year ago
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Erstellt von Nursultan Zhakupov
vor mehr als 7 Jahre
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Frage 1
Frage
An electric heater takes a current of 4A from a 250 V supply when operating normally. How long would it take the heater to convert 400 kJ of electrical energy?
Antworten
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400 s
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1000 s
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1600 s
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100 000 s
Frage 2
Frage
How much energy is converted in a resistor of 5.0 Ω carrying a current of 2.0 A for 10 seconds?
Antworten
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4.0 J
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25 J
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100 J
-
200 J
Frage 3
Frage
A lamp rated 6V, 2A is switched on for 60 seconds.
How much energy is used?
Antworten
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0.2 J
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20 J
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180 J
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720 J
Frage 4
Frage
The SI unit of power is Volts.
Antworten
- True
- False
Frage 5
Frage
For a given electrical appliance information of “2000 W, 240 V”, it means that when an operating voltage of 240 V is applied across the appliance, the appliance converts electrical energy into thermal energy at a rate of 2000 J per minute.
Antworten
- True
- False
Frage 6
Frage
1 watt is equal to 1 Joule per second
Antworten
- True
- False
Frage 7
Frage
The electrical energy has a unit of joules.
Antworten
- True
- False
Frage 8
Frage
To calculate the power P of any electrical appliance with a current I flowing through it and a potential difference V applied across it, we simply divide V by I.
Antworten
- True
- False
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