A current is passed through a straight wire. The magnetic field established around it has it's lines of force :

circular and endless

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oval in shape and endless

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straight

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all of the above

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Solution

The correct option is A circular and endless
According right hand screw rule magnetic lines of force are circular and endless around a straight wire carrying current. Strength of magnetic field is greater near the wire and lesser far away as shown in figure.

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A current is passed through a straight wire. The magnetic field established around it has it's lines of force :

The correct option is A circular and endlessAccording right hand screw rule magnetic lines of force are circular and endless around a straight wire carrying current. Strength of magnetic field is greater near the wire and lesser far away as shown in figure.

The correct option is A circular and endless
According right hand screw rule magnetic lines of force are circular and endless around a straight wire carrying current. Strength of magnetic field is greater near the wire and lesser far away as shown in figure.