Question

(a) Write Fleming's left-hand rule for the direction of force on a current carrying conductor placed in a magnetic field.
(b) Draw a diagram to show lines of magnetic field inside and around a current carrying solenoid.
(c) Write the names of four devices where current carrying conductor is used along with magnetic fields.

Answer 1

(a) According to Fleming's left-hand rule, stretch the thumb, forefinger and middle finger of your left hand such that they are mutually perpendicular. If the first finger points in the direction of magnetic field and the second finger in the direction of the electric current, then the thumb will point in the direction of motion or the force acting on the conductor.

(b) The diagram is shown to demonstrate the lines of magnetic field inside and around a current carrying solenoid.

(c) Devices that use current-carrying conductors and magnetic fields are electric motor, electric generator, loudspeakers and microphones.