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

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.

स्पष्ट करा
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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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पाठ 4: Effects of electric current - Exercises [पृष्ठ ६१]

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.


Which of the following property of a proton can change while it moves freely in a magnetic field? (There may be more than one correct answer.)


Which of the following property of a proton can change while it moves freely in a magnetic field? (There may be more than one correct answer.)


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.


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.


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?


Name and state the rule to determine the direction of magnetic field around a straight current-carrying conductor.


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


The diagram given below represents magnetic field caused by a current-carrying conductor which is: 

 

(a) a long straight wire
(b) a circular coil
(c) a solenoid
(d) a short straight wire 

 


The magnetic field lines in the middle of the current-carrying solenoid are?

(a) circles
(b) spirals
(c) parallel to the axis of the tube
(d) perpendicular to the axis of the tube


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. 


A current-carrying conductor is held in exactly vertical direction. In order to produce a clockwise magnetic field around the conductor, the current should passed in the conductor:

(a) from top towards bottom
(b) from left towards right
(c) from bottom towards top
(d) from right towards left 


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 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°

 


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 


 A coil ABCD mounted on an axle is placed between the poles N and S of a permanent magnet as shown in Figure.

  1. In which direction will the coil begin to rotate when current is passed through the coil in direction ABCD by connecting a battery at the ends A and D of the coil?
  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?

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


Differentiate between conductors and insulators.


The following diagram shows two parallel straight conductors carrying the same current. Copy the diagram and draw the pattern of the magnetic field lines around them showing their directions. What is the magnitude of the magnetic field at a point 'X' which is equidistant from the conductors? Give justification for your answer.


State whether a magnetic field is associated or not around a static 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 magnetic field directed in north direction acts on an electron moving in east direction. The magnetic force on the electron will act ____________.


Describe the activity that shows that a current-carrying conductor experiences a force perpendicular to its length and the external magnetic field. How does Fleming’s left-hand rule help us to find the direction of the force acting on the current carrying conductor?


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.
  2. Why does the current in the arm BC not contribute to the turning force on the coil?

What do you know about Michael Faraday?


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?


An alpha particle enters a uniform magnetic field as shown. The direction of force experienced by the alpha particle is ______.


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


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.

Name the law used to identify the radioactive radiation emitted by the element.


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