Two identical coils are placed near each other. If the current in the first coil is switched off suddenly, what will happen in the second coil?
A current is momentarily induced in the second coil in a direction that tries to keep the magnetic field constant.
By Lenz's law, when the current in the first coil is switched off, the collapsing magnetic field induces a momentary current in the second coil in a direction that opposes the change in flux, i.e. tries to keep the field constant.
Hence, a current is momentarily induced in the second coil in a direction that tries to keep the magnetic field constant.
Similar Questions
The direction of the magnetic field at the centre of a current-carrying circular loop is determined by which of the following?
A single-turn coil of radius R produces a magnetic field B at its centre. If the same wire is wound into a coil of n turns (each of radius R/n) carrying the same current I, what will be the value of the new field at the centre?
If the direction of current in a straight conductor is reversed, what will be the effect on the direction of the surrounding magnetic field lines?
A student wants to increase the magnetic field strength around a straight conductor carrying current. Which combination of changes will most effectively achieve this?
What happens to the magnetic field around a straight current-carrying conductor if the direction of the current is reversed?
If the current in a conductor is doubled while it remains perpendicular to the same magnetic field, how does the force on the conductor change?
Which statement best describes the application of the Right Hand Thumb Rule to a straight current-carrying conductor?
The right hand thumb rule is also known as _______________.
A coil of wire is moved rapidly into a region with a strong magnetic field. Which change will most likely increase the magnitude of the induced current in the coil?
In a generator, what would be the result if the coil is rotated at double the original speed in the same magnetic field?
Important Questions from Magnetism
What is the direction of magnetic field lines outside a magnet?
Which of the following statement is correct?
।. Magnetic field has both magnitude and direction.
II. The magnetic field inside a current-carrying straight long solenoid is the same at all points.
The magnetic effect of electric current was discovered by _____.
The important property of magnet which was exploited by navigators and travelers from the ancient times is:
The magnet used to lift and transport heavy loads like big metals, steel girders and scrap iron objects for loading and unloading purposes is known as____.
