Practice Case Study: Solar Water Heaters - 4.3 | Chapter 6 : Heat Transfer | ICSE Class 8 Physics
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4.3 - Case Study: Solar Water Heaters

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Learning

Practice Questions

Test your understanding with targeted questions related to the topic.

Question 1

Easy

What is the purpose of a solar water heater?

💡 Hint: Think about how sunlight relates to heating.

Question 2

Easy

What color are the tubes in a solar water heater usually?

💡 Hint: Consider which colors are best for absorbing heat.

Practice 4 more questions and get performance evaluation

Interactive Quizzes

Engage in quick quizzes to reinforce what you've learned and check your comprehension.

Question 1

What is the primary function of a solar water heater?

  • To cool water
  • To heat water using solar energy
  • To filter water

💡 Hint: Think about what heating does to water.

Question 2

True or False: Solar water heaters require electricity to operate.

  • True
  • False

💡 Hint: Consider the energy source for heating in this scenario.

Solve 1 more question and get performance evaluation

Challenge Problems

Push your limits with challenges.

Question 1

If a solar water heater saves a family 1200 kWh a year and they use this energy savings to power an electric heater for 4 hours a day, calculate how many additional kWh would be used by the electric heater in that time over a year. Assume the electric heater uses 2 kWh per hour.

💡 Hint: Consider how to multiply the usage per hour by daily and yearly duration.

Question 2

Assuming that the cost of installing a solar water heater is $1500, calculate how long it will take for it to pay for itself with an annual saving of $144. What if energy prices increase by 10% annually?

💡 Hint: Think about how yearly savings accumulate over time and consider justifying increased costs.

Challenge and get performance evaluation