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1. A portable radio has a built-in transformer so that it can work from the mains instead of batteries. Is this a step up or step down transformer?
a. A step-down transformer is one which reduces the .
b. The rectified DC voltage is equivalent to the battery .
2. State Faraday’s laws of electromagnetic induction.
a. When the magnetic flux in a closed circuit changes, anis generated.
b. The amount of emf induced varies directly with the rate at which the .
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