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प्रश्न
Which of the following correctly describes the magnetic field near a long straight wire?
पर्याय
The field consists of straight lines perpendicular to the wire
The field consists of straight lines parallel to the wire
The field consists of radial lines originating from the wire
The field consists of concentric circles centred on the wire
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उत्तर
The field consists of concentric circles centred on the wire.
Explanation:
The magnetic field near a long straight wire consists of concentric circles centred on the wire.
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संबंधित प्रश्न
When is the force experienced by a current-carrying conductor placed in a magnetic field largest?
State and explain the clock-face rule for determining the polarities of a circular wire carrying current.
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(a) from top towards bottom
(b) from left towards right
(c) from bottom towards top
(d) from right towards left
What happens when a current-carrying conductor is placed in a magnetic field?
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State Fleming's left-hand rule. Explain it with the help of labelled diagrams.
The force exerted on a current-carrying wire placed in a magnetic field is zero when the angle between the wire and the direction of magnetic field is:
45°
60°
90°
180°
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The force on the wire due to the magnet is directed:

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vertically downwards
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