(a) Under what conditions permanent electromagnet is obtained if a current carrying solenoid is used?
Support your answer with the help of a labelled circuit diagram.
(b) Insulation cover of which colour is conventionally used for earth wire? Why is an earth wire
connected to metallic parts of appliances?
Answers
Answer:
(a) The conditions required to obtain permanent electromagnet when a current carrying solenoid is used are
* The rod inside solenoid should be made of a magnetic material like steel, soft iron etc. *This type of material can retain the magnetic properties for a long time after magnetization.
(b)* green is the best suited colour for earth wire
* because when the body of an electrical appliances contains elecricity the earth wire controls and removes the current from the body of the appliances
*then carries it to the earth.so, the the current is removed from the body of the appliance
thank you
Answer:
(a) The conditions required to obtain permanent electromagnet when a current carrying solenoid is used are
* The rod inside solenoid should be made of a magnetic material like steel, soft iron etc. *This type of material can retain the magnetic properties for a long time after magnetization.
(b)* green is the best suited colour for earth wire
* because when the body of an electrical appliances contains elecricity the earth wire controls and removes the current from the body of the appliances
*then carries it to the earth.so, the the current is removed from the body of the appliance
Explanation:
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