What is the purpose of the laminated core in a transformer?a.To reduce eddy currentsb.To increase the resistancec.To provide electrical insulationd.To increase the inductance
Question
What is the purpose of the laminated core in a transformer?a.To reduce eddy currentsb.To increase the resistancec.To provide electrical insulationd.To increase the inductance
Solution
The purpose of the laminated core in a transformer is to reduce eddy currents.
Here's a step-by-step explanation:
-
A transformer operates on the principle of electromagnetic induction, which involves the generation of an electric current across a conductor situated in a changing magnetic field.
-
When alternating current is passed through the primary coil of a transformer, it creates a changing magnetic field around the coil. This changing magnetic field induces an electromotive force (EMF) or "voltage" in the secondary coil.
-
However, this changing magnetic field also induces voltages in the iron core of the transformer. These voltages can cause "eddy currents" to flow in the core. Eddy currents are circular currents induced within conductors by a changing magnetic field in the conductor.
-
Eddy currents can cause significant energy losses in the form of heat, reducing the efficiency of the transformer.
-
To mitigate this, the core of a transformer is made from stacks of laminations (thin sheets of metal), rather than a solid block. Each lamination is insulated from the next by a thin layer of insulating material.
-
This laminated design divides the core into many narrow parallel paths, which significantly reduces the eddy currents and their associated energy losses.
So, the correct answer is a. To reduce eddy currents.
Similar Questions
Transformer cores are laminated to reduce ……*1 pointLenz’s currentFaraday’s electromagnetic inductionEddy currentsAmpere’s current
Transformers are an essential part of the National Grid. What are they used for?To convert electricity from from a.c. to d.c. and vice versaTo adjust the supply of electricity according to how much energy is needed at a given timeTo improve the efficiency with which electrical energy can be transmitted around the countryTo allow energy to be transferred from one energy store to another2What name is given to the type of transformer which allows for the potential difference (‘voltage’) at which electricity is delivered to be increased?A high voltage transformerA boost transformerA step-up transformerA jump-up transformer3A current of 0.5 kA is flowing through a cable of resistance 20 Ω. Calculate the power dissipated in the cable.5 × 106 W10 W10 kW5 W4There is a potential difference of 250 V across an electrical cable. Calculate the amount of energy dissipated in the cable when a current of 100 A flows through it for 10 seconds.25 J2.5 J25,000 J250,000 J5A high voltage power cable transmits electrical energy with an efficiency of 0.8. If 2 × 107 W of electrical power is supplied to one end of the cable, how much is transmitted to the opposite end?1.6 × 109 W4 × 106 W2.5 × 107 W1.6 × 107 W
What is the primary function of a transformer?a.To transfer electrical energy between circuitsb.To convert mechanical energy into electrical energyc.To amplify electrical signalsd.To convert electrical energy into mechanical energy
Core benefit:The fundamental need or want that consumers satisfy by consuming the product or service. For example, the need to process digital images.
Consider the equivalent circuit of a practical transformer. Which element(s) represents the finite permeability of the transformer core?Select one:a.xmb.rcc.x1, x2d.r1, r2
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.