Difference between revisions of "5-MAG-9"
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| − | *6.17 describe the structure of a transformer, and understand that a transformer changes the size of an alternating voltage by having | + | *6.17 describe the structure of a transformer, and understand that a transformer changes the size of an alternating voltage by having different numbers of turns on the input and output sides |
| − | different numbers of turns on the input and output sides | + | |
*6.18 explain the use of step-up and step-down transformers in the largescale generation and transmission of electrical energy | *6.18 explain the use of step-up and step-down transformers in the largescale generation and transmission of electrical energy | ||
*6.19 know and use the relationship between input (primary)and output(secondary) voltages and the turns ratio for a transformer: | *6.19 know and use the relationship between input (primary)and output(secondary) voltages and the turns ratio for a transformer: | ||
Latest revision as of 06:31, 19 November 2012
- 6.17 describe the structure of a transformer, and understand that a transformer changes the size of an alternating voltage by having different numbers of turns on the input and output sides
- 6.18 explain the use of step-up and step-down transformers in the largescale generation and transmission of electrical energy
- 6.19 know and use the relationship between input (primary)and output(secondary) voltages and the turns ratio for a transformer:
<math>V_p/V_s=N_p/N_s</math>
- 6.20 know and use the relationship:
input power = output power
<math> V_p I_p = V_s I_s </math>
for 100% efficiency
Contents
Starter
Main Body of Lesson
Plenary
- transformers don't work with d.c., only with a.c.!
- for a 100% efficient transformer, Power supplied in Primary = Power in Secondary
- Vp x Ip = Vs x Is
Homework
- do the question sheet (Science Shared)
Additional Information
Resources Required
- transformer demos
Textbook References
Website References
- None
Skills Addressed
Safety/Hazards
Notes
- None
