Practice Activities/assessments (6) - Introduction to Magnetism and Transformers
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Activities/Assessments

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Practice Questions

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Question 1 Easy

What is magnetic flux?

💡 Hint: Think about how we measure magnetic fields.

Question 2 Easy

Define copper losses in transformers.

💡 Hint: Consider what happens when current flows through wires.

4 more questions available

Interactive Quizzes

Quick quizzes to reinforce your learning

Question 1

What is the primary function of a transformer's core?

To provide electrical insulation
To support windings
To provide a magnetic pathway

💡 Hint: Think about how transformers function.

Question 2

True or False: Core losses are variable and depend on the amount of current flowing through the transformer.

True
False

💡 Hint: Consider definitions of core losses.

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Challenge Problems

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Challenge 1 Hard

Given an Open Circuit test result with a core loss of 20 W and a Short Circuit test showing a copper loss of 50 W, calculate the total losses when the transformer operates at half-load.

💡 Hint: Consider the effects of varying load on copper losses.

Challenge 2 Hard

You have a transformer with a rated power of 30 kVA, core losses of 300 W, and copper losses of 600 W at full load. Calculate the efficiency at 75% load and 0.9 power factor.

💡 Hint: Pay attention to converting kVA to kW using power factor.

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