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प्रश्न
How is the magnetic field inside a given solenoid made strong?
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उत्तर
The magnetic field lines inside a solenoid can be made strong by
(i) Inserting a ferromagnetic core
(ii) Increasing the number of turns of the solenoid
(iii) Increasing the current passing through the solenoid.
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संबंधित प्रश्न
Derive an expression for the mutual inductance of two long co-axial solenoids of same length wound one over the other,
Define the term self-inductance of a solenoid.
In what respect is a toroid different from a solenoid?
A long solenoid is fabricated by closely winding a wire of radius 0.5 mm over a cylindrical nonmagnetic frame so that the successive turns nearly touch each other. What would be the magnetic field B at the centre of the solenoid if it carries a current of 5 A?
A copper wire having resistance 0.01 ohm in each metre is used to wind a 400-turn solenoid of radius 1.0 cm and length 20 cm. Find the emf of a battery which when connected across the solenoid will cause a magnetic field of 1.0 × 10−2 T near the centre of the solenoid.
A tightly-wound, long solenoid is kept with its axis parallel to a large metal sheet carrying a surface current. The surface current through a width dl of the sheet is Kdl and the number of turns per unit length of the solenoid is n. The magnetic field near the centre of the solenoid is found to be zero. (a) Find the current in the solenoid. (b) If the solenoid is rotated to make its axis perpendicular to the metal sheet, what would be the magnitude of the magnetic field near its centre?
During the construction of a solenoid, why is enamelled copper wire used for winding the helical turns?
In the working principle of a solenoid, how does each individual turn of the coil behave?
Applying Ampere's Law to the rectangular loop around a solenoid, the line integral equals \(Bl\) and the enclosed current is \(nlI\). Which sequence of steps correctly yields the magnetic field inside?
What is the magnetic field at the ends (edge) of a long solenoid carrying current \(I\)?
