(a) What happens when a bundle of wires of soft iron is placed inside the coil of a solenoid carrying a…
(a) What happens when a bundle of wires of soft iron is placed inside the coil of a solenoid carrying a steady current ? Name the device obtained. Why is it called so ?
(b) Draw the magnetic field lines inside a current carrying solenoid. What does this pattern of magnetic field lines indicate ?
Solution
(a) It gets magnetised
Electromagnet.
It behaves as a magnet only when current passes through the solenoid.
(b) [diagram of magnetic field lines: a straight current-carrying conductor and a solenoid] (Any one diagram)
This pattern indicates that the magnetic field is uniform.