Power and Energy (Grade 11 NSC Matric Physical Sciences): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What does electrical power measure in a circuit?
What does electrical power measure in a circuit?
Rate of energy conversion
Which formula should you use to calculate power when given current and voltage?
Which formula should you use to calculate power when given current and voltage?
When is the most appropriate formula to use?
When is the most appropriate formula to use?
When you know current and resistance
A component has 5 V across it and 2 Ω resistance. What power is dissipated?
A component has 5 V across it and 2 Ω resistance. What power is dissipated?
12.5 W
In a series circuit, what is true about current?
In a series circuit, what is true about current?
Same through all components
What is the formula relating energy, power, and time?
What is the formula relating energy, power, and time?
A 30 W bulb runs for 8 hours. How much energy is consumed in joules?
A 30 W bulb runs for 8 hours. How much energy is consumed in joules?
864,000 J
What does 1 kWh represent?
What does 1 kWh represent?
Using 1 kW of power for 1 hour
What is the cost per kWh for the first 150 kWh according to the tariff structure?
What is the cost per kWh for the first 150 kWh according to the tariff structure?
61.60 cents
Which appliance has the highest power rating?
Which appliance has the highest power rating?
Stove at 3600 W