B

The principle of mutual induction refers to the process where a change in current in one coil creates a varying magnetic field that induces an electromotive force (EMF) in another coil that is nearby.
Step 1: Analyze each option based on the principle of mutual induction.
Step 2: Induction coil uses mutual induction to generate high voltage from low voltage.
Step 3: A transformer operates on mutual induction to transfer electrical energy between two or more circuits.
Step 4: A Tesla coil also works on the principle of mutual induction to produce high-voltage, low-current, high-frequency alternating current electricity.
Step 5: A motor, however, primarily converts electrical energy into mechanical energy through the interaction of magnetic fields generated by currents flowing in conductors, and it does not rely on mutual induction in its basic operation.
Therefore, the device that does not work on the principle of mutual induction is the motor.