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10 Cards in this Set
- Front
- Back
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How does a transformer work |
When AC is in the primary coil, it produces an alternating magnetic field. The lies of alternating magnetic field pas through the secondary coil and induces voltage in it. |
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What happens if the lamp is connected to the secondary coil |
This is because the induced voltage causes a current in the secondary coil. So the lamp lights up. Why rors |
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Why doesn’t a transformer work with an DC |
This is because To make a transformer work we need an AC to induce pd while a DC produces a constany magnetic field |
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Formula of transformer |
Back (Definition) |
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Difference between a step up and step down transformer |
Back (Definition) |
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Construct a transformer device |
Back (Definition) |
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What’s an electricity grid |
Is the network of cables and transformer used to distribute electricity in our homes and other building from power stations |
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Why electricity grids use high clvoltahe |
This is because cables waste energy due to resistances. Current in them as a heating effect. For this reason high voltages reduces the current through the cables and this reduces the amount of energy lost as heat. |
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Equation when transformer are 100% |
Back (Definition) |
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Advantage of high voltage transmission |
The higher pd, the greater the efficiency of transferring electrical power through the grid |
