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प्रश्न
State and explain the Clock face rule for determining the polarities of a circular wire carrying current.
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उत्तर
Clock face rule:
This rule is used to determine the polarity of two faces of a current-carrying circular coil.
According to clock face rule, if we look at one face of the coil through which a current is passing, we have following conclusions:
1. If the current around the face of the coil flows in clockwise direction, that face of the coil will be south pole.
2. If the current around the face of the coil flows in anticlockwise direction, that face of the coil will be north pole.
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संबंधित प्रश्न
State the rule to determine the direction of a force experienced by a current-carrying straight conductor placed in a magnetic field which is perpendicular to it.
What are the various ways in which the strength of magnetic field produced by a current-carrying circular coil can be increased?
When is the force experienced by a current-carrying conductor placed in a magnetic field largest?
State two ways to increase the force on a current-carrying conductor in a magnetic field.
The force experienced by a current-carrying conductor placed in a magnetic field is the largest when the angle between the conductor and the magnetic field is:
45°
60°
90°
180°
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:
fron N to S
from S to N
vertically downwards
vertically upwards
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Is the current flowing clockwise or anticlockwise around the coil when viewed from above?
Which way does the wire in the diagram below tend to move?
State condition when magnitude of force on a current carrying conductor placed in a magnetic field is maximum?
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What happens when a current is passed in the coil?
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State whether a magnetic field is associated or not around a moving charge.
State under what conditions force acting on a current carrying conductor which is freely suspended in a magnetic field can be maximum.
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A copper wire is held between the poles of a magnet
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The graph (fig A) illustrates the correlation between the number of protons (x-axis) and the number of neutrons (y-axis) for elements A, B, C, D, and E in the periodic table. These elements are denoted by the letters rather than their conventional symbols. When the element C, depicted in the graph, undergoes radioactive decay, it releases radioactive rays. When these rays are directed into the plane of the paper in the presence of a magnetic field, as indicated in the fig B, they experience deflection, causing them to move upwards.
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Name the law used to identify the radioactive radiation emitted by the element.
