Join 60,000+ competitive exam aspirants
or with email
Your Cart
SubtotalтВ╣0
TotalтВ╣0
Examoogle тАв User тАв info@examoogle.com тАв EE-2024-8821
Chapter 1 of 12 тАв Page 1 of 248ЁЯФТ Protected PDF тАв Watermarked
Join 60,000+ competitive exam aspirants
Step down transformer increases
Voltage
Current
Power
Frequency
Current
A step-down transformer is designed to reduce the voltage level from the primary to the secondary winding while maintaining constant power. According to the principle of conservation of energy, if the voltage decreases, the current must increase proportionally to keep the input and output power balanced.
A step-down transformer is designed to reduce the voltage level from the primary to the secondary winding while maintaining constant power. According to the principle of conservation of energy, if the voltage decreases, the current must increase proportionally to keep the input and output power balanced.
VsтАЛVpтАЛтАЛ=IpтАЛIsтАЛтАЛ=a
S=VpтАЛIpтАЛ=VsтАЛIsтАЛ
The transformer operates on Faraday's law of electromagnetic induction. In an ideal transformer, VpтАЛIpтАЛ=VsтАЛIsтАЛ. Since a step-down transformer ensures VsтАЛ<VpтАЛ, it follows that IsтАЛ>IpтАЛ, resulting in an increase in current on the secondary side.
Transformers are constant power devices (ignoring losses).
In a step-down transformer, the secondary current is higher than the primary current.
Frequency remains constant in a transformer as it depends on the source supply.
Voltage and Current are inversely proportional for a fixed power load.
Efficient voltage regulation for power distribution.
Enables impedance matching for electrical loads.
Higher secondary currents require thicker winding wires (increased I2R losses).
Subject to magnetic leakage and hysteresis losses.
Power distribution at the final stage near houses.
Rectifier power supply units for electronics.
The frequency of the output is always identical to the input frequency (finтАЛ=foutтАЛ).
Option C is wrong because power is conserved (ideally), not increased.
Option A is the opposite of the definition of 'step-down'.
B is correct тАФ A step-down transformer decreases voltage, which causes a corresponding increase in current to maintain power balance.
Always remember that in an ideal transformer, power remains invariant, leading to an inverse relationship between voltage and current ratios.