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Q.

Which of the following shows the highest magnetic strength when the same current is passed through them?

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a

Straight conducting wire

b

Coil of wire

c

Solenoid wound on a wooden core

d

Solenoid wound on an iron core

answer is D.

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Detailed Solution

A solenoid wound on an iron core will show the strongest magnetic strength.
The solenoid coiled on an iron core will have the strongest magnetic strength if the same current is passed through straight conducting wires, a coil of wire, a solenoid wound on a wooden core, and a solenoid wound on an iron core. This is because the iron core is a magnetic material. It is powerful enough to draw heavy iron nails and metal paper clips.

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