# P3, Hydraulics and Transformers

HideShow resource information
• 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
1 of 13
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
2 of 13
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
3 of 13
What is the potential difference like in a step-up transformer?
More potentail difference across the secondary coil than across the primary coil
4 of 13
What is the potential difference like in a step-down transformer?
Potential difference is less across the secondary coil than the primary coil
5 of 13
If a transformer is 100% efficiant, what will electrical power output equal to?
The electrical power input
6 of 13
What type of frequency does a switch mode transformer work at?
A high frequency between 50kHz and 200kHz.
7 of 13
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
8 of 13
What is the kHz of a mains supply?
50 kHz
9 of 13
How much power do switch mode transformers used when turned on?
Very little but no load is applied
10 of 13
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
11 of 13
What happens if force is exerted on to one point of a liquid?
liquid will be transported to another point of the liquid
12 of 13
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
13 of 13

## 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?

### Card 4

#### Front

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

### Card 5

#### Front

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