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Physics 2 and 3 GCSE AQA Help

Can somebody explain to me Transformers (P3) Fuses and Terminal Velocity please. My exam is tomorrow
I also have the exam tomorrow. There are a few steps to transformers that you need to know when describing the process of voltage induction.
1. An alternating current is carried to the primary coil via insulated wires
2. This creates a changing magnetic field in the iron core
3. This produces a magnetic field across the secondary coil
4. As a result, an alternating potential difference/voltage is made and therefore an alternating current

I suggest you memorise these steps as this may come up tomorrow. I got this info from MyGCSEScience


Terminal velocity is when the opposite forces are equal. For example, a parachutist has 2 main forces acting on him, air resistance and gravity/weight. At some point, he will reach terminal velocity as both forces will become equal. Therefore, the resultant force will be 0 so he'll be travelling at a constant velocity.

Fuses are designed to melt to break off the electrical circuit. It is placed in series to the live wire so it can cut off the current supply to the live wire, so no further damage is done.

All the best for the exam and hope that helps. :smile:

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