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An E.M.F. can be induced by _________
It is the dot product of magnetic field vector and area vector.
emf=BAcos(theta), hence if either of the three, that is, magnetic field, area or angle changes, thee emf will change.
What happens to the current in a coil while accelerating a magnet inside it?
A chance in magnetic field induces an emf. When there is an emf, there has to be a current. Hence, when the magnet is moved inside a coil, the current in it increases.
What is the consequence of motor effect?
Motor effect is when a current carrying conductor in a magnetic field experiences a force, hence its consequence is electromagnetic induction.
The total number of magnetic field lines passing through an area is termed as?
The number of magnetic flux lines per unit area is the magnetic flux, because flux is the number of field lines per unit area.
The formula for induced emf is __________
The formula for induced emf is: emf=Blv, where B is the magnetic field, l is the length of the conductor and v is the velocity with which it is moving in the magnetic field.
If a conductor 0.2m long moves with a velocity of 0.3m/s in a magnetic field of 5T, calculate the emf induced.
The formula for induced emf is: emf=Blv. Substituting the values of B, l and v from the question, we get emf=0.3V.
Find the length of a conductor which is moving with a velocity 0.4m/s in a magnetic field of 8T, inducing an emf of 20V.
The formula for induced emf is: emf=Blv. Substituting the values of B, emf and v from the question, we get l=6.25m.
Find the strength of magnetic field in a conductor 0.5m long moving with a velocity of 10m/s, inducing an emf of 20V.
The formula for induced emf is: emf=Blv. Substituting the values of l, emf and v from the question, we get B=4T.
What does emf stand for?
emf stands for electromotive force. It is the voltage developed by any source of electrical energy.
What is emf?
Electromotive force is not actually a force. It is basically a voltage. It is the voltage developed by any source of electrical energy.
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