SEARCH
You are in browse mode. You must login to use MEMORY

   Log in to start

level: Transformers 2 (HARD)

Questions and Answers List

level questions: Transformers 2 (HARD)

QuestionAnswer
An equation that relates the number of turns in the coils of transformers to the potential differences across the coils.Turns Ratio Equation
What does the Turns Ratio Equation determine in transformers?The Turns Ratio Equation determines the relationship between the number of turns in the coils and the potential differences across the coils.
A transformer that increases the voltage in the secondary coil by having more turns on the secondary coil compared to the primary coil.Step-Up Transformer
How does a step-up transformer affect the number of turns in its coils?A step-up transformer increases the number of turns in the secondary coil.
A transformer that decreases the voltage in the secondary coil by having fewer turns on the secondary coil compared to the primary coil.Step-Down Transformer
How does a step-down transformer affect the number of turns in its coils?A step-down transformer decreases the number of turns in the secondary coil.
The ratio of the voltages in the primary and secondary coils of a transformer.Voltage Ratio in Transformers
What does the Voltage Ratio in Transformers represent?The Voltage Ratio represents the relationship between the potential differences in the primary and secondary coils.
The process of determining the output voltage (potential difference) in the secondary coil using the Turns Ratio Equation.Calculating Output Voltage
For example, an a.c. power supply has a voltage of 230 V and a transformer has 4000 turns on the primary coil and 800 turns on the secondary coil. What is the output voltage?46 V.
The winding arrangements of wire in transformers, consisting of primary and secondary coils.Transformer Coils
What do the coils in transformers consist of, and what is their significance?The coils in transformers consist of primary and secondary coils, and their turns determine the transformer's operation.
The voltage or electrical potential difference across the coils of transformers.Potential Difference in Transformers
How is the potential difference related to the Turns Ratio Equation in transformers?The potential difference is directly related to the Turns Ratio Equation, which establishes the relationship between turns and voltages in transformer coils.
An equation that relates the turns ratio, number of turns in the primary coil (Np), and number of turns in the secondary coil (Ns) in transformers.Transformer Equation for Turns
What does the Transformer Equation for Turns determine?The Transformer Equation for Turns determines the relationship between the turns ratio and the number of turns in the primary and secondary coils.
Conditions for a step-up transformer where the number of turns in the secondary coil (Ns) is greater than the number of turns in the primary coil (Np).Step-Up Transformer Conditions
What are the conditions for a step-up transformer in terms of turns?In a step-up transformer, Ns > Np.
Conditions for a step-down transformer where the number of turns in the primary coil (Np) is greater than the number of turns in the secondary coil (Ns).Step-Down Transformer Conditions
What are the conditions for a step-down transformer in terms of turns?In a step-down transformer, Np > Ns.
The process of utilizing the turns ratio equation to calculate the number of turns in the primary or secondary coil of a transformer.Using Turns Ratio Equation for Number of Turns
How is the Turns Ratio Equation employed to determine the number of turns in a transformer?The Turns Ratio Equation is used to work out the number of turns in either the primary or secondary coil of a transformer.
An illustrative scenario where the transformer converts 10 V into 200 V with 50 turns on its primary coil.Example Scenario with Turns Ratio Equation
Explain the scenario of a transformer converting 10 V to 200 V with 50 turns on the primary coil.In this example, the Turns Ratio Equation is applied, and since Ns > Np, the transformer is identified as a step-up transformer.
Characteristics of a transformer designed to increase the voltage, typically with more turns in the secondary coil.Step-Up Transformer Characteristics
What are the key characteristics of a step-up transformer?A step-up transformer is characterized by having a greater number of turns in the secondary coil, resulting in increased voltage.
Characteristics of a transformer designed to decrease the voltage, typically with more turns in the primary coil.Step-Down Transformer Characteristics
What are the key characteristics of a step-down transformer?A step-down transformer is characterized by having a greater number of turns in the primary coil, resulting in decreased voltage.
The effectiveness of high-voltage transmission cables in minimizing energy loss as heat during the transmission of electric power.Efficiency of High-Voltage Transmission Cables
What does the efficiency of high-voltage transmission cables refer to?The efficiency of high-voltage transmission cables refers to their ability to reduce energy loss as heat during the transmission of electric power.
The energy lost as heat in power cables due to their resistance when current flows through them.Resistance-Related Energy Loss
What causes energy loss as heat in power cables?Energy loss as heat in power cables is caused by the resistance they exhibit when current flows through them.
The process of calculating the power lost as heat in cables transmitting current at a low voltage (230 V), considering cable resistance and power equations.Power Loss Calculation at Low Voltage (230 V)
How is power loss calculated at low voltage (230 V) in power cables?Power loss at low voltage is calculated by applying the power equation, taking into account cable resistance and the current needed.
The process of calculating the power lost as heat in cables transmitting current at high voltage (400 kV) using the transformer power equation.Power Loss Calculation at High Voltage (400 kV)
How is power loss calculated at high voltage (400 kV) in power cables?Power loss at high voltage is calculated using the transformer power equation, which involves determining the current needed before the step-down transformer.
The comparison of energy efficiency between power transmission at low voltage and high voltage, considering power losses as heat.Power Efficiency Comparison
What is the purpose of comparing power efficiency between low and high voltage transmission?The comparison of power efficiency evaluates the impact of energy losses as heat and demonstrates the advantages of high-voltage transmission in minimizing such losses.
The action of reducing energy wastage, particularly as heat, during the transmission of electric power through the use of high-voltage transmission cables.Minimizing Energy Wastage
How does high-voltage transmission contribute to minimizing energy wastage?High-voltage transmission minimizes energy wastage by reducing power losses as heat, making it a more efficient method of electric power transmission.
The equation used to calculate the power in a transformer system, involving voltage and current values.Transformer Power Equation
What is the transformer power equation, and how is it used in power transmission?The transformer power equation involves voltage and current values and is utilized to calculate power in a transformer system, aiding in the analysis of power transmission efficiency.
The process of transmitting electric power at a high voltage of 400 kV, often associated with reduced energy loss as heat.Power Transmission at 400 kV
What advantages are associated with power transmission at 400 kV?Power transmission at 400 kV offers advantages such as reduced energy loss as heat, contributing to greater efficiency in the transmission of electric power.