Question detail
Which answer would earn credit when explain that mains electricity is an alternating-current supply is assessed?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Domestic uses and safety
Question
- A. Check the named quantity, component or circuit relationship before choosing the response.
- B. Write every electricity equation even when the question asks for a description.
- C. Use the same rule for series and parallel circuits without checking the arrangement.
- D. Describe energy transfer when the question asks for charge or current only.
Answer
The correct answer is: Check the named quantity, component or circuit relationship before choosing the response.
Explanation
Check the named quantity, component or circuit relationship before choosing the response. This avoids confusing current, charge and time while staying aligned to explain that mains electricity is an alternating-current supply.
Common mistake
Direct and alternating potential difference common mistake 1
Giving a vague answer instead of directly addressing: Explain that mains electricity is an alternating-current supply..
Answer by clearly explaining how to explain that mains electricity is an alternating-current supply..
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