Define the term generator. State whether this is a DC or an AC generator. Give a reason for the answer to QUESTION 10.2. A diagram of a transformer is shown below. The transformer has 40 turns on the primary coil and 80 turns on the secondary coil. The voltage on the primary coil is 120 volt. Explain why this is a step-up transformer. Calculate the value of the secondary voltage.

NSC Technical Sciences Transformers: Define the term generator. Stat

Define the term generator - NSC Technical Sciences - Question 10 - 2023 - Paper 1

Question 10

Define the term generator. State whether this is a DC or an AC generator. Give a reason for the answer to QUESTION 10.2. A diagram of a transformer is shown below... show full transcript

Worked Solution & Example Answer:Define the term generator - NSC Technical Sciences - Question 10 - 2023 - Paper 1

Step 1

Define the term generator.

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Answer

A generator is a device that converts mechanical energy into electrical energy. It harnesses the mechanical motion, usually through a rotating motion, to produce electricity.

Step 2

State whether this is a DC or an AC generator.

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Answer

This is an AC generator.

Step 3

Give a reason for the answer to QUESTION 10.2.

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Answer

AC generators have slip rings, which allow the current to alternate direction, differentiating them from DC generators that use a commutator.

Step 4

Explain why this is a step-up transformer.

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Answer

This is a step-up transformer because the number of turns in the secondary coil (80 turns) is greater than the number of turns in the primary coil (40 turns). According to the transformer principle, a higher number of turns in the secondary coil results in a higher output voltage.

Step 5

Calculate the value of the secondary voltage.

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Answer

Using the transformer formula:

$\frac{V_s}{V_p} = \frac{N_s}{N_p}$

where:

$V_s$ = secondary voltage
$V_p$ = primary voltage = 120 volts
$N_s$ = number of turns in secondary = 80
$N_p$ = number of turns in primary = 40

We can rearrange the formula to find $V_s$ :

$V_s = V_p \times \frac{N_s}{N_p} = 120 \times \frac{80}{40} = 240 \text{ volts}$

Define the term generator - NSC Technical Sciences - Question 10 - 2023 - Paper 1

Worked Solution & Example Answer:Define the term generator - NSC Technical Sciences - Question 10 - 2023 - Paper 1

Define the term generator.

State whether this is a DC or an AC generator.

Give a reason for the answer to QUESTION 10.2.

Explain why this is a step-up transformer.

Calculate the value of the secondary voltage.

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