Define the term induced electric current.
Induced electric current is the electric current that is created in a wire when the magnetic field around the wire changes. This can happen if a magnet moves near the wire or if the magnetic field gets stronger or weaker. This changing magnetic field makes electricity flow in the wire without needing a battery or power source.
According to Faraday’s law of electromagnetic induction, whenever the magnetic field through a conductor changes, it causes a voltage (called electromotive force or emf) to be generated in the conductor. This voltage pushes electric charges in the conductor, creating an electric current, which is called the induced current.
In simple terms, an induced current is the electric current produced in a wire due to the change in magnetic field around it. This is the basic principle behind devices like electric generators and transformers.
Magnetic Effects of Electric Current
More Questions on Magnetic Effects of Electric Current
Imagine that you are sitting in a chamber with your back to one wall. An electron beam, moving horizontally from back wall towards the front wall, is deflected by a strong magnetic field to your right side. What is the direction of magnetic field?
View solution
When is the force experienced by a current–carrying conductor placed in a magnetic field largest?
View solution
At the time of short circuit, the current in the circuit (a) reduces substantially. (b) does not change. (c) increases heavily. (d) vary continuously
View solution
Which of the following correctly describes the magnetic field near a long straight wire? (a) The field consists of straight lines perpendicular to the wire. (b) The field consists of straight lines parallel to the wire. (c) The field consists of radial lines originating from the wire. (d) The field consists of concentric circles centred on the wire
View solution
State the effect of a magnetic field on the path of a moving charged particle.
View solution
Write the frequency of alternating current (AC) in India. How many times per second it changes its direction?
View solution
Explain why alternating current is preferred over direct current for transmission over long distances.
View solution
Alternating current has a frequency of 50 Hz. What is meant by this statement? How many times does it change its direction in one second? Give reason for your answer
View solution
Mention and explain the function of an earth wire. Why it is necessary to earth metallic appliances?
View solution
What precaution should be taken to avoid the overloading of the domestic electric circuit?
View solution
Electric appliances like electric -press, toaster, fans etc are connected to electric mains through three-pin plug. Why?
View solution
What is the function of an earth wire? Why is it necessary to earth metallic casing of electric appliances?
View solution
A current-carrying straight conductor is placed in the east-west direction. What will be the direction of the force experienced by this conductor due to earth’s magnetic field? How will this force get affected?
View solution
Why is the earth pin thicker and longer than the live and the neutral pins?
View solution
When is the force experienced by a current-carrying conductor placed in magnetic field largest?
View solution
State the factors on which strength of magnetic field at a point due to a current carrying conductor depends?
View solution
Name and state rule used to determine the direction of magnetic field produced around a straight conductor carrying current?
View solution
In Faradays experiment if instead of moving the magnet towards the coil we move the coil towards the magnet. Will there be any induced current? Justify your answer. Compare the two cases.
View solution
If field lines of a magnetic field are crossed at a point, what does it indicate ?
View solution