Which one among the following does NOT have any linkage with the phenomenon of electromagnetic induction?

Electromagnetic induction is the process where a changing magnetic field induces an electromotive force (emf) in a conductor. Electric transformers operate on this principle through mutual induction between coils. Induction cookers utilize electromagnetic induction to generate eddy currents in the cookware, which then produce heat. A galvanometer, specifically the moving coil type, works on the principle that a current-carrying coil placed in a magnetic field experiences a torque, causing deflection; this is the magnetic effect of current rather than induction [1]. An electron microscope, however, uses electron beams and electromagnetic lenses to focus the beam based on the Lorentz force (deflection of moving charges in a magnetic field), which does not involve the induction of current by a changing magnetic flux. Therefore, the electron microscope has the least linkage with the specific phenomenon of electromagnetic induction.

Sources

1. [1] https://www.aakash.ac.in/important-concepts/physics/galvanometer