Two thin, long, parallel wires, separated by a distance ‘$d$’ carry a current of ‘$i$’ in the same direction. They will
Two thin, long, parallel wires, separated by a distance ‘$d$’ carry a current of ‘$i$’ in the same direction. They will
- [AIEEE 2005]
- A
Attract each other with a force of ${\mu _0}{i^2}/(2\pi {d^2})$
- B
Repel each other with a force of ${\mu _0}{i^2}/(2\pi {d^2})$
- C
Attract each other with a force of ${\mu _0}{i^2}/(2\pi d)$
- D
Repel each other with a force of ${\mu _0}{i^2}/(2\pi d)$
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- [JEE MAIN 2021]
$STATEMENT-1$ A vertical iron rod has a coil of wire wound over it at the bottom end. An alternating current flows in the coil. The rod goes through a conducting ring as shown in the figure. The ring can float at a certain height above the coil. Because
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- [IIT 2007]