Understanding Transformers

What is a transformer?

• A transformer is a programming language used for data analysis.

• A transformer is a type of electrical device used to change voltage levels.

• A transformer is a neural network architecture that uses self-attention mechanisms to process sequential data.

• A transformer is a physical machine that converts mechanical energy into electrical energy.

Explain the basic components of a transformer.

• Primary coil, secondary coil, and insulator

• Transformer core, electrical circuit, and switch

• The basic components of a transformer are the primary winding, secondary winding, and core.

• Input winding, output winding, and casing

What is the primary function of a transformer?

• To change the voltage level of alternating current.

• To convert direct current to alternating current.

• To increase the frequency of electrical signals.

• To store electrical energy for later use.

Describe the working principle of a transformer.

• A transformer generates electricity through chemical reactions.

• A transformer amplifies electrical signals without any coils.

• A transformer works by using electromagnetic induction to transfer electrical energy between two coils.

• A transformer converts AC to DC using a rectifier.

What are the two main types of transformers?

• High-voltage and Low-voltage transformers

• Step-up and Step-down transformers

• Inductive and Capacitive transformers

• Single-phase and Three-phase transformers

How does a step-up transformer differ from a step-down transformer?

• A step-up transformer converts AC to DC; a step-down transformer converts DC to AC.

• A step-up transformer decreases voltage; a step-down transformer increases voltage.

• Both transformers increase voltage but differ in size.

• A step-up transformer increases voltage; a step-down transformer decreases voltage.

What is the formula for calculating transformer turns ratio?

• TR = Np / Ns

• TR = Np + Ns

• TR = Ns / Np

• TR = Np - Ns

Define transformer efficiency and its importance.

• Transformer efficiency is the measure of voltage regulation in a transformer.

• Transformer efficiency is the total power consumed by the transformer.

• Transformer efficiency is the ratio of input power to output power.

• Transformer efficiency is the ratio of output power to input power, and it is important for minimizing energy loss and reducing operational costs.

What factors affect the efficiency of a transformer?

• Voltage rating

• Transformer size

• Core material, winding resistance, load conditions, frequency, copper losses, iron losses.

• Ambient temperature

How is transformer efficiency calculated?

• Efficiency (%) = (Output Power / Input Power) x 100

• Efficiency (%) = (Output Power - Input Power) x 100

• Efficiency (%) = (Input Power / Output Power) x 100

• Efficiency (%) = (Input Power + Output Power) x 100