Lesson 6

TTO 3 — Physics

Chapter 1

Section 2 + Start section 3

Transformer

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This lesson contains 17 slides, with text slides and 1 video.

Lesson duration is: 45 min

Items in this lesson

Lesson 6

TTO 3 — Physics

Chapter 1

Section 2 + Start section 3

Transformer

Slide 1 - Slide

Lesson 6

TTO 3 — Physics

Chapter 1

Section 2 + Start section 3

Transformer

This lesson

Rearranging the formula
Ideal transformer
Practice exercises

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Voltage & number of coils

\frac{​ U ^{​ p ​ ​} ​ ​}{​ U ^{​ s ​ ​} ​} = \frac{​ N ^{​ p ​ ​} ​ ​}{​ N ^{​ s ​ ​} ​}

Up :voltage primary coil

Us : Voltage secondary coil

Np : Number of turns primary coil

Ns: Number of turns secondary coil

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Ideal transformer

P^{​ p ​ ​} = P^{​ s ​ ​}

P = \frac{​ E ​ ​}{​ t ​}

P = U \cdot I

Two formulas to calculate power

P^{​ p ​ ​} = P^{​ s ​ ​}

U^{​ p ​ ​} \cdot I^{​ p ​ ​} = U^{​ s ​ ​} \cdot I^{​ s ​ ​}

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Practice exercise

1) A primary coil on a transformer has a voltage of 240V and 500 turns. What is the voltage over the secondary coil if the secondary coil has 25 turns?

2) 3. A secondary transformer has a current of 25A and a voltage of 5V. On the primary transformer the current is 15A. Find the primary voltage.

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Section 3 — Electricity in the home

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Fusebox

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What type of circuit is used for in group in a fusebox?

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Power

P = U \cdot I

P t o t = P 1 + P 2 + P 3 + . . .

P^{​ t ​ ​} = U \cdot (I^{​ 1 ​ ​} + I^{​ 2 ​ ​} + I^{​ 3 ​ ​} + . . .)

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Homework

Read: section 3 and 4

Do:

Section 3, Exercise 1, 2 and 3
Section 4, Exercise 1 and 2

Next lesson: Practical!

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Lesson 6

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