हिंदी

Name the following diagram and explain the concept behind it.

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प्रश्न

Name the following diagram and explain the concept behind it.

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उत्तर

Name: Fleming’s left-hand rule

Concept: It represents Fleming’s left-hand rule used for finding the direction of the magnetic force when a current-carrying conductor is placed in a magnetic field.

According to this rule, the left-hand thumb, index finger, and middle finger are stretched so as to be perpendicular to each other. If the index finger is in the direction of the magnetic field and the middle finger points in the direction of the current, then the direction of the thumb is the direction of the force on the conductor.

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अध्याय 4: Effects of electric current - Exercise [पृष्ठ ६१]

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बालभारती Science and Technology Part 1 [English] Standard 10 Maharashtra State Board
अध्याय 4 Effects of electric current
Exercise | Q 10. b. | पृष्ठ ६१
एससीईआरटी महाराष्ट्र Science and Technology Part 1 [English] Standard 10 Maharashtra State Board
अध्याय 4 Effects of electric current
Answer the Following | Q 10 (ii) | पृष्ठ ३६

संबंधित प्रश्न

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


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

 

State the form of magnetic field lines around a straight current-carrying conductor.


Fill in the following blank with suitable words: 

For a current-carrying solenoid, the magnetic field is like that of a ...........


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


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Name any two factors on which the strength of magnetic field produced by a current-carrying solenoid depends. How does it depend on these factors?


What type of core should be put inside a current-carrying solenoid to make an electromagnet?


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(c) anticlockwise
(d) upwards


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


State Fleming's left-hand rule. Explain it with the help of labelled diagrams.


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°

 


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


Two coils A and B of insulated wire are kept close to each other. Coil A is connected to a galvanometer while coil B is connected to a battery through a key. What would happen if: 

a current is passed through coil B by plugging the key?  

Explain your answer mentioning the name of the phenomenon involved.

 


Two coils A and B of insulated wire are kept close to each other. Coil A is connected to a galvanometer while coil B is connected to a battery through a key. What would happen if: 

the current is stopped by removing the plug from the key? 

Explain your answer mentioning the name of the phenomenon involved. 


Name and state the law which is used to determine the direction of force on a current carrying conductor placed in a magnetic field.


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  2. Why is a commutator necessary for continuous rotation of the coil?
  3. Complete the diagram with commutator, etc. for the flow of current in the coil?

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State whether a magnetic field is associated or not around a moving charge.


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A simple motor is made in a school laboratory. A coil of wire is mounted on an axle between the poles of a horseshoe magnet, as illustrated.

In the example above, coil ABCD is horizontal and the battery is connected as shown.

  1. For this position, state the direction of the force on the arm AB.
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Assertion (A): A magnetic field exerts a force on a moving charge in the same direction as the direction of the field itself.
Reason (R): The direction of force is given by Fleming’s left-hand rule.


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Assertion (A): A current carrying straight conductor experiences a force when placed perpendicular to the direction of magnetic field.

Reason (R): The net charge on a current carrying conductor is always zero.


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