#### Table of Contents

- 1. How does frequency affect a transformer?
- 2. Which type of current makes a transformer work?
- 3. What are the ideal transformers?
- 4. Which type of transformer core is most efficient?
- 5. What is the ideal efficiency of a transformer?
- 6. What is Faraday’s Law equation?
- 7. WHAT IS A in EMF equation?
- 8. What is motional EMF?

## How does frequency affect a transformer?

Effect of frequency The EMF of a transformer at a given flux increases with frequency. By operating at higher frequencies, transformers can be physically more compact because a given core is able to transfer more power without reaching saturation and fewer turns are needed to achieve the same impedance.

## Which type of current makes a transformer work?

alternating current

## What are the ideal transformers?

What is an Ideal Transformer? Definition: A transformer that doesn’t have any losses like copper and core is known as an ideal transformer. In this transformer, the output power is equivalent to the input power. The efficiency of this transformer is 100%, which means there is no loss of power within the transformer.

## Which type of transformer core is most efficient?

Toroidal cores You may like this **How do you get your professor to like you?**

## What is the ideal efficiency of a transformer?

The ideal transformer has 100 percent efficiency, i.e., the transformer is free from hysteresis and eddy current loss.

## What is Faraday’s Law equation?

Faraday’s law of induction is a basic law of electromagnetism that predicts how a magnetic field will interact with an electric circuit to produce an electromotive force (EMF). EMF=−NΔΦΔt EMF = − N Δ Φ Δ t . This relationship is known as Faraday’s law of induction. The units for EMF are volts, as is usual.

## WHAT IS A in EMF equation?

As the armature rotates, a voltage is generated in its coils. In the case of a generator, the emf of rotation is called the Generated emf or Armature emf and is denoted as Er = Eg. In the case of a motor, the emf of rotation is known as Back emf or Counter emf and represented as Er = Eb.

## What is motional EMF?

An emf induced by motion relative to a magnetic field B is called a motional emf and is given by. emf = Bℓv (B,ℓ, and v perpendicular) where ℓ is the length of the object moving at speed v relative to the field.

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