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The phenomenon due to which there is an induced current in one coil due to current in a neighbouring coil is?
When there is a current induced in a coil, due to the magnetic field caused by the current there is current induced in the neighbouring coil as well. This is known as mutual inductance.
If the current in one coil is steady, what happens to the mutual inductance?
A magnetic field is produced when there is a changing electric field. Hence the magnetic field is zero when the current is steady. When the magnetic field is zero there is no current induced in the other coil, thus electric field is zero.
If the current in one coil is steady, what happens to the mutual inductance?
A magnetic field is produced when there is a changing electric field. Hence the magnetic field is zero when the current is steady. When the magnetic field is zero there is no current induced in the other coil, thus electric field is zero.
What is the SI unit of mutual inductance?
Mutual inductance is the inductance between the two neighbouring coils. Since it is a type of inductance, its unit is that of inductance, that is, henry.
Which, among the following, is the correct expression for mutual inductance?
Mutual inductance is the product of the number of turns in one coil and the flux linkages of that coil, divided by the current in the other coil. Hence M=N2φ2/I1 is the correct expression.
If the flux linkage in coil 1 is 3Wbt and it has 500 turns and the current in coil 2 is 2A, calculate the mutual inductance.
We know that mutual inductance is the product of the number of turns in one coil and the flux linkages of that coil, divided by the current in the other coil.
M=3*500/2=750H.
The flux linkage in coil 1 is 3Wbt and it has x turns and the current in coil 2 is 2A, calculate the value of x if the mutual inductance is 750H.
We know that mutual inductance is the product of the number of turns in one coil and the flux linkages of that coil, divided by the current in the other coil.
N=750*2/3= 300 turns.
If the current in one coil becomes steady, the magnetic field is?
A magnetic field is produced when there is a changing electric field. Hence the magnetic field is zero when the current is steady.
The flux linkage in coil 1 is x Wb^{t} and it has 500 turns and the current in coil 2 is 2A, calculate the value of x if the mutual inductance is 750H.
We know that mutual inductance is the product of the number of turns in one coil and the flux linkages of that coil, divided by the current in the other coil.
φ=750*2/500= 3Wb^{t}.
The flux linkage in coil 1 is 3 Wbt and it has 500 turns and the current in coil 2 is xA, calculate the value of x if the mutual inductance is 750H.
We know that mutual inductance is the product of the number of turns in one coil and the flux linkages of that coil, divided by the current in the other coil.
I=3*500/750= 2A.
What is the coupling coefficient when all the flux of coil 1 links with coil 2?
When all the flux of coil 1 links with coil 2 it is known as an ideal coupling where the coupling coefficient is 1.
What is the coupling coefficient when there is ideal coupling?
When all the flux of coil 1 links with coil 2 it is known as an ideal coupling where the coupling coefficient is 1.
Can the coupling coefficient practically ever be equal to 1?
Coupling coefficient can never be equal to 1 because all the flux of coil 1 can never link with coil 2. There are bound to be losses.
Mutual inductance between to coupled coils depends on?
Faraday’s law of induction states that, the magnitude of the induced EMF is the product of the number of turns of the coil and the rate of change of flux linkage in it. Hence, the mutual inductance depends on the rate of change of flux linkage.
Which, among the following, is the correct formula to fing coupling coefficient?
The correct formula for coupling coefficient is k=M/sqrt(L1L2). Where, L1 and L2 are the inductance values of the first and second coil respectively and M is the mutual inductance.
What happens to coupling coefficient when the flux linkage of coil 1 and coil 2 increases?
When the flux linkage of coil 1 and coil 2 increases, its mutual inductance increases. The coupling coefficient is directly proportional to the mutual inductance hence as mutual inductance increases, the coupling coefficient increases.
What is the SI unit of coupling coefficient?
The expression to find mutual inductance is k=M/sqrt(L1L2)= H/sqrt(H*H)= 1. Therefore it does not have any unit.
Find the coupling coefficient if the Mutual inductance is 20H, the inductance of coil 1 is 2H and the inductance of coil 2 is 8H.
we know that:
k=M/sqrt(L1L2)
Substituting the values from the question, we get k=5.
Find the value of x if the Mutual inductance is x H, the inductance of coil 1 is 2H and the inductance of coil 2 is 8H. The coupling coefficient is 5.
we know that:
k=M/sqrt(L1L2)
Substituting the values from the question, we get M=20H.
Find the value of x if the Mutual inductance is 20H, the inductance of coil 1 is xH and the inductance of coil 2 is 8H. The coupling coefficient is 5.
we know that:
k=M/sqrt(L1L2)
Substituting the values from the question, we get L1=2H.
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