Which of the following devices does NOT make use of current carrying conductor in a magnetic field?

Correct option is D

Correct Answer: (D) Electric Heater

Explanation:

• An electric heater operates on the principle of the heating effect of electric current and does not involve the interaction of a current-carrying conductor with a magnetic field.
• It uses resistance to convert electrical energy into heat energy.

Why the Other Options Are Incorrect:

• (Electric motor): An electric motor works based on the interaction between a current-carrying conductor and a magnetic field, following the principle of electromagnetic induction.
• (Electric fan): The fan uses an electric motor, which relies on the interaction of current and a magnetic field to rotate its blades.
• (Electric generator): A generator works on the principle of electromagnetic induction, where a current is produced in a conductor placed in a changing magnetic field.