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State and Explain the Clock Face Rule for Determining the Polarities of a Circular Wire Carrying Current. - Science

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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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पाठ 2: Magnetic Effects of Electric Current - Exercise 2 [पृष्ठ ८२]

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लखमीर सिंह Physics (Science) [English] Class 10
पाठ 2 Magnetic Effects of Electric Current
Exercise 2 | Q 18 | पृष्ठ ८२

संबंधित प्रश्‍न

Observe the following figure:

If the current in the coil A is changed, will some current be induced in the coil B? Explain.


What concealed do you get from the observation that a current-carrying wire deflects a compass needle placed near it?


State qualitatively the effect of inserting an iron core into a current-carrying solenoid.

 

What is the shape of a current-carrying conductor whose magnetic field pattern resembles that of a bar magnet?


Draw the magnetic lines of force due to a circular wire carrying current. 


 List three ways in which the magnetic field strength of a current-carrying solenoid can be increased?


The front face of a circular wire carrying current behaves like a north pole. The direction of current in this face of circular wire is:

(a) clockwise
(b) downwards
(c) anticlockwise
(d) upwards


A current-carrying straight wire is held in exactly vertical position. If the current passes through this wire in the vertically upward direction, what is the direction of magnetic field produced by it? Name the rule used to find the direction of magnetic field. 


When is the force experienced by a current-carrying conductor placed in a magnetic field largest?


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°

 


If the current in a wire is flowing in the vertically downward direction and a magnetic field is applied from west to east, what is the direction of force in the wire?


 force experienced by a current-carrying straight conductor placed in a magnetic field which is perpendicular to it. 


A flat coil ABCD is freely suspended between the pole of U-shaped permanent magnet with the plane of coil parallel to the magnetic field.

What happens when a current is passed in the coil?


Name the following diagram and explain the concept behind it.


A flat coil ABCD is freely suspended between the pole of a U-shaped permanent magnet with the plane of coil parallel to the magnetic field. 

When will coil come to rest?


Write Fleming’s left hand rule.


The strength of magnetic field around a current-carrying conductor is ____________.


Two LED bulbs of 10W and 5W are connected in series. If the current flowing through 5W bulb is 0.005A, the current flowing through 10W bulb is ______.


If the strength of the current flowing through a wire is increased, the strength of the magnetic field produced by it ______.


A copper conductor is placed over two stretched copper wires whose ends ate connected to a D.C. supply as shown in the diagram.

  1. What should be the magnetic poles at the points A and B lying on either side of the conductor to experience the force in the upward direction?
  2. Name the law used to find these polarities.


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