Comprehension Questions: Power and Energy

Descrição

This is a short lesson about power and energy of electricity
Nursultan Zhakupov
Quiz por Nursultan Zhakupov, atualizado more than 1 year ago
Nursultan Zhakupov
Criado por Nursultan Zhakupov mais de 7 anos atrás
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Resumo de Recurso

Questão 1

Questão
An electric heater uses 60 kJ of electrical energy in five minutes. What is the power rating of the heater?
Responda
  • 720 kW
  • 12 kW
  • 1.2 kW
  • 200 W

Questão 2

Questão
A small heater has a rating of 15V, 4A. How much energy does it consume if it is turned on for two minutes?
Responda
  • 7.5 J
  • 120 J
  • 450 J
  • 7200 J

Questão 3

Questão
Figure shows the electrical information of an electrical appliance. (a) What is the current generated if the casserole is turned on at normal operating voltage of 230V and a power of 1400 W?
Responda
  • 0.16 A
  • 6.1 A
  • 28 A
  • 322 A

Questão 4

Questão
(b) How much electrical energy is consumed for one month (30 days), if the casserole is turned on for 2 hours everyday?
Responda
  • 2.8 kJ
  • 42 kJ
  • 84 kJ
  • 302 MJ

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