A uniform current-carrying narrow solenoid produces
uniform magnetic field inside the solenoid
A long, narrow, tightly-wound solenoid carrying a steady current produces a magnetic field that is nearly uniform in magnitude and direction throughout its interior, running parallel to the solenoid's axis, much like the field inside a bar magnet.
Outside the solenoid, the field lines spread out and weaken rapidly with distance, so the field there is not uniform, ruling out the second option. The field lines are also not straight everywhere (they curve back outside the solenoid), and the field does not oscillate for a steady (DC) current, ruling out the remaining options.
Hence, a current-carrying solenoid produces a uniform magnetic field inside itself.
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____.