P3, Hydraulics and Transformers

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  • Created by: emmajane_
  • Created on: 18-05-14 17:55
What happens if an electrical conductor 'cuts' through a magnetic field?
A potential difference is induced across the ends of the conductor
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What happens if a magnet is moved into a coil of wire? What is this the basic structure of?
A potential difference is induced across the ends of the coil- Basic structure of a stansformer
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What does an alternating current in the primary coil produce in the iron core?
A changing magnetic field in the iron core and hence in the secondary coil
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What is the potential difference like in a step-up transformer?
More potentail difference across the secondary coil than across the primary coil
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What is the potential difference like in a step-down transformer?
Potential difference is less across the secondary coil than the primary coil
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If a transformer is 100% efficiant, what will electrical power output equal to?
The electrical power input
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What type of frequency does a switch mode transformer work at?
A high frequency between 50kHz and 200kHz.
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What are switch mode transformers often used for and why?
Used for things such as phone chargers because they are lighter and smaller than traditional transformers
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What is the kHz of a mains supply?
50 kHz
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How much power do switch mode transformers used when turned on?
Very little but no load is applied
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What enables systems to be used as a force multiplyer?
The use of different cross-sectional areas on the effort and load side of a hydraulic system
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What happens if force is exerted on to one point of a liquid?
liquid will be transported to another point of the liquid
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What is pressure like on a liquid, and how can liquid be described?
Pressure in a liquid is transmitted equally in all directions. Liquid can be described as virtually incompressible
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Other cards in this set

Card 2

Front

What happens if a magnet is moved into a coil of wire? What is this the basic structure of?

Back

A potential difference is induced across the ends of the coil- Basic structure of a stansformer

Card 3

Front

What does an alternating current in the primary coil produce in the iron core?

Back

Preview of the front of card 3

Card 4

Front

What is the potential difference like in a step-up transformer?

Back

Preview of the front of card 4

Card 5

Front

What is the potential difference like in a step-down transformer?

Back

Preview of the front of card 5
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