GEOLOGY

Detailed explanation-1: -In the home, by far the most common use of electromagnets is in electric motors. Think of all of those bits of electrical equipment with some kind of electric motor: vacuum cleaners, refrigerators, washing machines, tumble driers, food blenders, fan ovens, microwaves, dish-washers, hair driers.

Detailed explanation-2: -Among the given appliances only the electric heater does not use an electromagnet. It works based on the heating effect of the electric current.

Detailed explanation-3: -Detailed Solution. The correct answer is option 3, i.e. Beta ray.

Detailed explanation-4: -The complete Question is as follows: Which of the following is NOT part of an electromagnet? Explanation: Among the options, option C) bamboo stick is correct because the bamboo stick is not used in an electromagnet.