Materials and Construction
Straight silicon steel (containing Si from 0.5 to 5%) because of their low hysterisis loss and high magnetic permeability are used for electrical appliances. Which of the following electrical appliances made of silicon steel contains maximum percentage of silicon (about 4%)?

Induction motors
High frequency transformers
Generators and small motors
Armature of small motors/generators

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Materials and Construction
Lead is

Used as a shock absorber (in mattress form) between the foundation an steel framework of skyscrapper buildings
Not used as pigment (in its compound forms) for paints
Used as a cathodic material
Not resistant to corrosion

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