Communicate about the use of transformers in daily life

Transformer

4.3

Transformer

	Transformer
	A tool that can increase or decrease the capacity of the alternating current supply.

There are two types of transformers which are step-up transformer and step-down transformer.

Step-up transformer
- Increase the potential difference or voltage.
- \(V_s > V_p\), \(N_s > N_p\) , \(I_s < I_p\)
Step-down transformer
- Lower the potential difference or voltage.
- \(V_s < V_p\), \(N_s < N_p\), \(I_s > I_p\)

	Transformer formula
	\(\dfrac {V_s}{V_p} = \dfrac {N_s}{N_p}\), where V = voltage and N = number of turns

Ideal transformer

A tool used to efficiently convert the input power to the output power without any heat loss to the environment.

It has \(100 \%\) efficiency.

Formula

\(\begin {aligned} \text {Output power} &= \text {Input power} \\ P_s &= P_p \\ V_s \space I_s &= V_p \space I_p, \end {aligned} \)

\(\begin {aligned} \text {Efficiency} &= \dfrac {\text {Output power}}{\text {Input power}} \times 100\% \\ &= \dfrac {V_s \space I_s}{V_p \space I_p} \times 100\%. \end {aligned}\)

Transformer

4.3

Transformer

	Transformer
	A tool that can increase or decrease the capacity of the alternating current supply.

There are two types of transformers which are step-up transformer and step-down transformer.

Step-up transformer
- Increase the potential difference or voltage.
- \(V_s > V_p\), \(N_s > N_p\) , \(I_s < I_p\)
Step-down transformer
- Lower the potential difference or voltage.
- \(V_s < V_p\), \(N_s < N_p\), \(I_s > I_p\)

	Transformer formula
	\(\dfrac {V_s}{V_p} = \dfrac {N_s}{N_p}\), where V = voltage and N = number of turns

Ideal transformer

A tool used to efficiently convert the input power to the output power without any heat loss to the environment.

It has \(100 \%\) efficiency.

Formula

\(\begin {aligned} \text {Output power} &= \text {Input power} \\ P_s &= P_p \\ V_s \space I_s &= V_p \space I_p, \end {aligned} \)

\(\begin {aligned} \text {Efficiency} &= \dfrac {\text {Output power}}{\text {Input power}} \times 100\% \\ &= \dfrac {V_s \space I_s}{V_p \space I_p} \times 100\%. \end {aligned}\)

Transformer

Transformer

Chapter : Electromagnetism

Topic : Communicate about the use of transformers in daily life

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