Single Phase Transformers

What is the role of a transformer in power distribution?

• To increase the current for better efficiency.

• To store energy for later use.

• The role of a transformer in power distribution is to change voltage levels for efficient transmission and safe distribution.

• To convert AC to DC for distribution.

How does load affect transformer efficiency?

• Load affects transformer efficiency by increasing copper losses at higher loads, while iron losses remain constant, leading to optimal efficiency at a specific load.

• Load has no effect on transformer efficiency.

• Transformer efficiency is highest at no load.

• Higher loads decrease copper losses significantly.

Tags

NGSS.HS-PS3-3

NGSS.HS-PS3-4

How can you determine if a transformer is functioning properly?

• Check input/output voltages, inspect for damage, test continuity, and monitor temperature.

• Listen for unusual sounds from the transformer

• Check the color of the transformer casing

• Measure the transformer with a ruler

Tags

NGSS.MS-ETS1-1

What is the difference between an autotransformer and a conventional transformer?

• A conventional transformer can step up voltage while an autotransformer cannot.

• An autotransformer uses a single winding for both input and output, while a conventional transformer has separate windings.

• An autotransformer has a higher efficiency than a conventional transformer.

• An autotransformer requires more space than a conventional transformer.

How is transformer efficiency calculated?

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

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

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

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

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

What is the purpose of insulation testing in transformers?

• To assess the integrity and effectiveness of insulation materials in transformers.

• To measure the temperature of the transformer.

• To evaluate the efficiency of the transformer under load.

• To determine the load capacity of the transformer.

What is the primary function of a single-phase transformer?

• To convert AC to DC

• To step up or step down AC voltages

• To store electrical energy

• To convert electrical energy to mechanical energy

Tags

NGSS.HS-PS3-3

Which component of a single-phase transformer is responsible for transferring electrical energy between circuits?

• Core

• Windings

• Insulation

• Cooling system

Tags

NGSS.HS-PS2-5

How does the core material of a single-phase transformer affect its efficiency?

• It has no effect on efficiency

• A high-resistance core increases efficiency

• A low-resistance core decreases efficiency

• A high-permeability core increases efficiency

What is the role of insulation in a single-phase transformer?

• To conduct electricity between windings

• To prevent electrical leakage and short circuits

• To increase the voltage output

• To cool the transformer