Ultimate Electromagnets & Transformers Examination Questions - Grade 12
Answer all 20 questions carefully by selecting the option you think is correct for each one, and review your results at the end to check your understanding of electromagnets and transformers.
How to Answer these questions
Grade 12 students should take time to answer these questions because electromagnetism and transformers are core concepts in physics that form the foundation for further studies in engineering, electronics, and technology-related fields. By working through the questions, students strengthen their understanding of how electricity and magnetism interact in real-life applications such as power generation, transmission, and electrical devices. Mastering these concepts not only improves exam performance but also prepares students for careers in areas like electrical engineering, telecommunications, renewable energy, and technical trades, where these principles are applied every day.
QUESTION 1 OF 20
What is an electromagnet?
Which core is best for making a strong electromagnet?
What happens when current increases in a coil?
The direction of magnetic field around a current-carrying wire is given by:
What is electromagnetic induction?
Which law explains the direction of induced current?
What does Faraday’s law describe?
A coil of wire is also known as a:
Increasing the number of turns in a coil will:
A transformer works on the principle of:
A step-up transformer:
A step-down transformer:
In a step-up transformer, the secondary coil has:
Which type of current is required for a transformer to work?
What is the function of the primary coil in a transformer?
What happens when a magnet moves inside a coil?
According to Lenz’s law, the induced current:
What increases induced voltage in a coil?
Fleming’s right-hand rule is used to find:
An electromagnet is commonly used in:
QUIZ DONE!
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