मराठी
महाराष्ट्र राज्य शिक्षण मंडळएस.एस.सी (इंग्रजी माध्यम) इयत्ता १० वी

I) Which Principle is Explained in this Figure ?Ii) Which Rule is Used to Find Out the Direction of Force in this Principle?Iii) in Which Machine this Principle is Used?

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प्रश्न

i) Which principle is explained in this figure?
ii) Which rule is used to find out the direction of a force in this principle?
iii) In which machine this principle is used? Draw a diagram showing working of that machine

टीपा लिहा
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उत्तर

i. A force is exerted on the current-carrying conductor in the presence of a magnetic field.
ii. The Fleming’s Left-hand Rule is used.
iii. Electric Motor 

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  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
2018-2019 (March) Balbharati Model Question Paper Set 1

संबंधित प्रश्‍न

Consider a circular loop of wire lying in the plane of the table. Let the current pass through the loop clockwise. Apply the right-hand rule to find out the direction of the magnetic field inside and outside the loop.


The magnetic field in a given region is uniform. Draw a diagram to represent it.


The magnetic field inside a long straight solenoid-carrying current ______.


A positively-charged particle (alpha-particle) projected towards west is deflected towards north by a magnetic field. The direction of magnetic field is ______.


State whether the following statement is true or false

The field at the centre of a long circular coil carrying current will be parallel straight lines.


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


Name the rule for finding the direction of magnetic field produced by a straight current-carrying conductor.


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


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


 What are the various ways in which the strength of magnetic field produced by a current-carrying circular coil can be increased?


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?


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


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. 


What happens when a current-carrying conductor is placed in a magnetic field?


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


 Name one device whose working depends on the force exerted on a current-carrying coil placed in a magnetic field. 


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°


A horizontal wire carries a current as shown in Figure below between magnetic poles N and S: 

  

Is the direction of the force on the wire due to the magnet:

(a) in the direction the current
(b) vertically downwards
(c) opposite to the current direction
(d) vertically upwards 


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?


What is the force on a current-carrying wire that is parallel to a magnetic field? Give reason for your answer. 


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.

 


Name three factors on which the magnitude of force on a current carrying conductor placed in a magnetic field depends and state how does the force depend on the factors stated by you.


State condition when magnitude of force on a current carrying conductor placed in a magnetic field is maximum?


How will the direction of force be changed, if the current is reversed in the conductor placed in a magnetic field?


Name the following diagram and explain the concept behind it.


Name and state the rule of determine the direction of force experienced by a current carrying straight conductor placed in a uniform magnetic field which is perpendicular to it. 


When do you use (i) Fleming's left hand rule, and (ii) Fleming's right hand rule?

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

When will the couple acting on the coil be

  1. maximum
  2. minimum?

Differentiate between conductors and insulators.


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 Zero.


The north pole of Earth’s magnet is in the ____________.


A current flows in a wire running between the S and N poles of a magnet lying horizontally as shown in the figure below:

The force on the wire due to the magnet is directed ____________.


When current is parallel to a magnetic field, then force experience by the current-carrying conductor placed in a uniform magnetic field is ____________.


Which of the following factors affect the strength of force experience by current-carrying conduct in a uniform magnetic field?


A copper wire is held between the poles of a magnet

The current in the wire can be reversed. The pole of the magnet can also be changed over. In how many of the four directions shown can the force act on the wire?


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