Single Phase Transformers

Question 1: What are the main components of a single-phase transformer?

• Primary coil, Secondary coil, Aluminum core

• Primary winding, Secondary winding, Iron core

• Input winding, Output winding, Steel core

• Copper core, Tertiary winding, Quaternary winding

Tags

NGSS.HS-PS3-5

Question 2: How is the core of a transformer constructed?

• Using plastic sheets

• Using wooden planks

• Using laminated steel sheets

• Using aluminum foil

Question 3: What is the working principle of a single-phase transformer?

• Based on the principle of electromagnetic induction

• By harnessing the energy of wind

• Based on the principle of gravitational force

• Using the power of solar energy

Tags

NGSS.HS-PS2-5

Question 4: How does a transformer step up or step down voltage?

• By varying the number of turns in the primary and secondary coils.

• By changing the material of the transformer

• By adjusting the frequency of the input voltage

• By increasing the resistance in the primary coil

Tags

NGSS.HS-PS3-5

Question 5: In which power systems are single-phase transformers commonly used?

• High voltage power systems

• Agricultural power systems

• Residential and small commercial power systems

• Industrial power systems

Tags

NGSS.HS-PS3-3

NGSS.HS-PS3-5

Question 6: What are the different applications of single-phase transformers in power distribution?

• Generating electricity, controlling traffic lights, and building houses

• Transporting goods, communication, and entertainment

• Cooking food, heating water, and lighting bulbs

• Stepping up or stepping down voltage, voltage regulation, and isolation

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-3

Question 7: How is transformer efficiency calculated?

• Output power / Input power * 100

• Input power - Output power

• Input power / Output power * 100

• Output power + Input power

Question 8: What factors affect the efficiency of a single-phase transformer?

• Color of the transformer

• Number of turns in the primary winding

• Size of the transformer

• Load current, power factor, and core and copper losses

Tags

NGSS.HS-PS2-5

Question 9: What is voltage regulation in a transformer?

• Ability to maintain a constant input voltage despite variations in the output voltage or load

• Ability to regulate the frequency of the output voltage

• Ability to produce high voltage from low voltage input

• Ability to maintain a constant output voltage despite variations in the input voltage or load

Question 10: How is voltage regulation calculated for a single-phase transformer?

• % regulation = (V_no-load + V_full-load) / V_full-load * 100%

• % regulation = (V_no-load - V_full-load) / V_full-load * 100%

• Voltage regulation is not calculated for a single-phase transformer

• % regulation = (V_full-load - V_no-load) / V_full-load * 100%