SCIENCE
PHYSICAL SCIENCES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Decrease the battery size.
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Use a nail with a galvanized coating.
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Wrap more turns of wire around the nail.
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Replace the iron nail with a piece of steel.
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Detailed explanation-1: -They wrapped 50 turns of copper wire around an iron nail and hooked the ends of the wire to a 1.5 volt battery. They picked up 15 paper clips with their electromagnet, but they want to make it stronger. What should they do? Decrease the battery size.
Detailed explanation-2: -If you get some copper wire and coil it up, and connect its ends to a small battery, you can make a weak electromagnet! To make an even stronger electromagnet, coil your copper wire around a large iron nail. The nail is induced to become a magnet (magnetic induction), and makes the whole thing stronger.
Detailed explanation-3: -Electromagnets can be created by wrapping a wire around an iron nail and running current through the wire. The electric field in the wire coil creates a magnetic field around the nail. In some cases, the nail will remain magnetised even when removed from within the wire coil.
Detailed explanation-4: -An electromagnet is made by winding an insulated copper wire around a soft iron core either in the shape of a solenoid or U-shape and passing current through it.
Detailed explanation-5: -Neatly wrap the wire around the nail. The more wire you wrap around the nail, the stronger your electromagnet will be. Make certain that you leave enough of the wire unwound so that you can attach the battery. When you wrap the wire around the nail, make certain that you wrap the wire all in one direction.