Answer
Verified
387.9k+ views
Hint: A transformer is used to increase (step-up) or decrease (step-down) the voltage across an electric circuit. Transformer works on alternating current by the principle of electromagnetic induction. The process of stepping up or stepping down the voltage depends upon the number of turns in primary (input) coil or secondary (output) coil.
Complete step by step answer:
A transformer is defined as a passive electrical device that has the capacity to transfer electrical energy from one circuit to another through the process of electromagnetic induction.
The three main parts of a transformer:
1. Primary Winding of the Transformer
2. Magnetic Core of the Transformer
3. Secondary Winding of the Transformer
Working Principle of Transformer:
The mutual induction between the two or more windings, also known as coils, allows for electrical energy to be transferred between the electrical circuits.
Let’s say we have a winding which is supplied by an alternating electrical voltage source. The alternating current through the winding will produce a continually varying and alternating magnetic flux that surrounds the winding. If another coil or winding is brought close to this winding, some portion of this alternating magnetic flux will link with the second winding as well. As this magnetic flux is continually varying in its amplitude and direction, there must be a changing flux linkage in the second winding or coil. According to Faraday’s law of electromagnetic induction, there will be an EMF induced in the second winding. If the circuit of this secondary winding is closed, then electric current will flow through it.
Transformers are used to increase, step up, or decrease, step down, voltage levels between the electric circuits. A transformer that increases the voltage between primary winding to secondary winding is defined as a step-up transformer, whereas, a transformer that decreases the voltage between primary winding to secondary winding is defined as a step-down transformer.
The process of stepping up and stepping down the voltage depends upon the number of turns in the primary and secondary coil. For stepping up the voltage, the number of turns in secondary should be more than the number of turns in primary coil, while for stepping down the voltage, the number of turns in secondary should be less than the number of turns in primary coil.
Leclanche cell works on Direct Current (DC) and therefore gives direct current as its output. The turn ratio has no significance here because the transformer works on Alternating current (AC) and not on Direct Current (DC). As the input from a leclanche cell does not vary with time, the magnetic flux linked with the secondary also remains constant and thus the induced emf across secondary is zero. The output will be zero.
The voltage developed across the secondary would be $0V$.
Hence, the correct option is A.
Note:
Transformers work on Alternating current since its value continuously keeps on changing with time. The reason behind the induced emf in the secondary coil is the changing amount of current which results in continuously varying magnetic flux across the secondary coil. The purpose of the transformer core is to provide a low reluctance (less opposition) path, through which the maximum amount of flux produced by the primary winding is passed through and linked with the secondary winding to provide the maximum output.
Complete step by step answer:
A transformer is defined as a passive electrical device that has the capacity to transfer electrical energy from one circuit to another through the process of electromagnetic induction.
The three main parts of a transformer:
1. Primary Winding of the Transformer
2. Magnetic Core of the Transformer
3. Secondary Winding of the Transformer
Working Principle of Transformer:
The mutual induction between the two or more windings, also known as coils, allows for electrical energy to be transferred between the electrical circuits.
Let’s say we have a winding which is supplied by an alternating electrical voltage source. The alternating current through the winding will produce a continually varying and alternating magnetic flux that surrounds the winding. If another coil or winding is brought close to this winding, some portion of this alternating magnetic flux will link with the second winding as well. As this magnetic flux is continually varying in its amplitude and direction, there must be a changing flux linkage in the second winding or coil. According to Faraday’s law of electromagnetic induction, there will be an EMF induced in the second winding. If the circuit of this secondary winding is closed, then electric current will flow through it.
Transformers are used to increase, step up, or decrease, step down, voltage levels between the electric circuits. A transformer that increases the voltage between primary winding to secondary winding is defined as a step-up transformer, whereas, a transformer that decreases the voltage between primary winding to secondary winding is defined as a step-down transformer.
The process of stepping up and stepping down the voltage depends upon the number of turns in the primary and secondary coil. For stepping up the voltage, the number of turns in secondary should be more than the number of turns in primary coil, while for stepping down the voltage, the number of turns in secondary should be less than the number of turns in primary coil.
Leclanche cell works on Direct Current (DC) and therefore gives direct current as its output. The turn ratio has no significance here because the transformer works on Alternating current (AC) and not on Direct Current (DC). As the input from a leclanche cell does not vary with time, the magnetic flux linked with the secondary also remains constant and thus the induced emf across secondary is zero. The output will be zero.
The voltage developed across the secondary would be $0V$.
Hence, the correct option is A.
Note:
Transformers work on Alternating current since its value continuously keeps on changing with time. The reason behind the induced emf in the secondary coil is the changing amount of current which results in continuously varying magnetic flux across the secondary coil. The purpose of the transformer core is to provide a low reluctance (less opposition) path, through which the maximum amount of flux produced by the primary winding is passed through and linked with the secondary winding to provide the maximum output.
Recently Updated Pages
Basicity of sulphurous acid and sulphuric acid are
Assertion The resistivity of a semiconductor increases class 13 physics CBSE
Three beakers labelled as A B and C each containing 25 mL of water were taken A small amount of NaOH anhydrous CuSO4 and NaCl were added to the beakers A B and C respectively It was observed that there was an increase in the temperature of the solutions contained in beakers A and B whereas in case of beaker C the temperature of the solution falls Which one of the following statements isarecorrect i In beakers A and B exothermic process has occurred ii In beakers A and B endothermic process has occurred iii In beaker C exothermic process has occurred iv In beaker C endothermic process has occurred
The branch of science which deals with nature and natural class 10 physics CBSE
What is the stopping potential when the metal with class 12 physics JEE_Main
The momentum of a photon is 2 times 10 16gm cmsec Its class 12 physics JEE_Main
Trending doubts
Difference Between Plant Cell and Animal Cell
Difference between Prokaryotic cell and Eukaryotic class 11 biology CBSE
How do you solve x2 11x + 28 0 using the quadratic class 10 maths CBSE
Select the correct plural noun from the given singular class 10 english CBSE
What organs are located on the left side of your body class 11 biology CBSE
The sum of three consecutive multiples of 11 is 363 class 7 maths CBSE
What is the z value for a 90 95 and 99 percent confidence class 11 maths CBSE
Fill the blanks with the suitable prepositions 1 The class 9 english CBSE
How many squares are there in a chess board A 1296 class 11 maths CBSE