In transformer, there is no _ connection between the two coils but they are linked?
Correct answer: B. Electrical, magnetically
- A. Magnetic, electrically
- B. Electrical, magnetically
- C. Magnetic, magnetically
- D. Electrical, optically
Explanation
In a transformer, there is no electrical connection between the two coils, which are typically referred to as the primary and secondary coils. However, they are magnetically linked due to the shared magnetic core. The primary coil is connected to an alternating current (AC) power source, which creates a changing magnetic field in the core. This changing magnetic field induces a voltage in the secondary coil through electromagnetic induction, allowing for the transfer of electrical energy from the primary to the secondary coil without a direct electrical connection
This question appeared on the UHS MDCAT 2022 paper, which you can sit online with every answer explained.
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About Transformers
Transformers transfer alternating electrical energy between coils by mutual induction, with voltage ratio determined by the turns ratio. The topic covers step-up and step-down transformers, current changes, ideal power conservation and practical losses such as heating and flux leakage. A transformer requires changing magnetic flux, so it does not operate with steady direct current.
Practise Electromagnetic Induction
288 free Electromagnetic Induction MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
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