Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Transformers - schoolphysics
Document related concepts
Mercury-arc valve wikipedia , lookup
Portable appliance testing wikipedia , lookup
War of the currents wikipedia , lookup
Spark-gap transmitter wikipedia , lookup
Power engineering wikipedia , lookup
Stray voltage wikipedia , lookup
Ground (electricity) wikipedia , lookup
Buck converter wikipedia , lookup
Electric machine wikipedia , lookup
Power inverter wikipedia , lookup
Electrical substation wikipedia , lookup
Stepper motor wikipedia , lookup
Voltage optimisation wikipedia , lookup
Earthing system wikipedia , lookup
Ignition system wikipedia , lookup
Mains electricity wikipedia , lookup
Voltage regulator wikipedia , lookup
Opto-isolator wikipedia , lookup
Rectiverter wikipedia , lookup
Three-phase electric power wikipedia , lookup
Magnetic core wikipedia , lookup
History of electric power transmission wikipedia , lookup
Alternating current wikipedia , lookup
Switched-mode power supply wikipedia , lookup
Transcript
Transformers 1. Will a transformer work with direct current (d.c) or alternating current (a.c)? ………………………………………………………………………………………………………. 2. What is meant by: (a) a step down transformer ………………………………………………………………………………………………………. (b) a step up transformer ………………………………………………………………………………………………………. 3. Write down one place/appliance where you would expect to find a step down transformer ………………………………………………………………………………………………………. 4. Write down one place/appliance where you would expect to find a step up transformer ………………………………………………………………………………………………………. 5. In a step up transformer which coil is made of the thinner wire? ………………………………………………………………………………………………………. 6. A certain transformer has 1000 windings on the primary coil and 2000 windings on the secondary coils. Complete the following table showing the input and output voltages. Input voltage Output voltage 20 v d.c 12 v a.c 200 V a.c 7. You may have made a simple transformer from two C cores held together with spring clips. If you remove the clips and try and pull the cores apart while the transformer is switched on you hear a loud buzzing noise. Why is this? ………………………………………………………………………………………………………. ………………………………………………………………………………………………………. 8. Why is the core of a transformer made of thin metal strips called laminations. ……………………………………………………………………………………………………….
