Class 10 Exam  >  Class 10 Notes  >  Science Class 10  >  Force on a Current Carrying Conductor & Fleming's Left & Right Hand Rule

Force on a Current Carrying Conductor & Fleming's Left & Right Hand Rule | Science Class 10 PDF Download

FORCE ON A CURRENT CARRYING CONDUCTOR PLACED IN A MAGNETIC FIELD 

A current carrying conductor produces a magnetic field around it. When it is placed in a magnetic field, the two magnetic fields interact with each other and a net force acts on the conductor.

If the conductor of length l, carrying current I is lying inside a magnetic field of intensity B and is making an angle q with it, then force acting on the conductor is given by

F = IlB sin Θ

Force on a Current Carrying Conductor & Fleming`s Left & Right Hand Rule | Science Class 10If the conductor is lying perpendicular to the magnetic field, then

θ = 90° [sin θ = 1] and the force becomes F = IlB.

This force acts in a direction which is perpendicular to the plane containing the conductor and the magnetic field (Fig.) and is maximum.

If the conductor is lying parallel to the magnetic field, then θ = 0° (sin θ = 0) and the force becomes zero and is minimum.

Fleming's Left Hand Rule 

Direction of the force acting on a current carrying conductor when placed in a magnetic field is given by Fleming's left hand rule, which states that: 

If the forefinger, second finger and thumb of the left hand are stretched at right angles to each other, with the forefinger in the direction of the field and the second finger in the direction of the current then the thumb indicates the direction of the force. 

Force on a Current Carrying Conductor & Fleming`s Left & Right Hand Rule | Science Class 10

Factors on which the force acting on the current carrying conductor depends

The force acting on a current carrying conductor is placed in the magnetic field depends upon :

(i) The strength of the magnetic field : If the conductor is placed in a strong magnetic field, it experiences a large force. That is, F∝ B (strength of magnetic field)

(ii) The strength of the electric curent : If large current flows through the conductor placed in the magnetic field, it experiences a large force. That is F ∝ I.

(iii) The length of the conductor : A long conductor experiences a greater force than the short conductor, when placed in the magnetic field. That is, F ∝ ℓ.

That is F∝ BIℓ

or F = kBIl

If k = 1, F = BIℓ

then B = Force on a Current Carrying Conductor & Fleming`s Left & Right Hand Rule | Science Class 10

If I = 1amp. and l = 1m then B = F

Thus, magnetic field strength (B) is defined as the force acting per unit current per unit length of a conductor placed perpendicular to the direction of the magnetic field.

SI unit of magnetic field strength is Tesla.

Force on a Current Carrying Conductor & Fleming`s Left & Right Hand Rule | Science Class 10  

The document Force on a Current Carrying Conductor & Fleming's Left & Right Hand Rule | Science Class 10 is a part of the Class 10 Course Science Class 10.
All you need of Class 10 at this link: Class 10
105 videos|457 docs|112 tests

FAQs on Force on a Current Carrying Conductor & Fleming's Left & Right Hand Rule - Science Class 10

1. What is the force on a current-carrying conductor placed in a magnetic field?
Ans. The force experienced by a current-carrying conductor placed in a magnetic field is known as the electromagnetic force. This force is perpendicular to both the direction of the current and the magnetic field.
2. What is Fleming's left-hand rule?
Ans. Fleming's left-hand rule is a mnemonic device used to determine the direction of the force experienced by a current-carrying conductor in a magnetic field. It states that if we stretch out our left hand with the thumb, index finger, and middle finger perpendicular to each other, then the thumb represents the direction of the force, the index finger represents the direction of the magnetic field, and the middle finger represents the direction of the current.
3. What is electromagnetic induction?
Ans. Electromagnetic induction is the process of generating an electromotive force (EMF) in a conductor when it is exposed to a changing magnetic field. This phenomenon is the basis for the functioning of generators, transformers, and many other electrical devices.
4. How does Fleming's left-hand rule relate to electromagnetic induction?
Ans. Fleming's left-hand rule is often used to determine the direction of the induced current in a conductor when it moves through a magnetic field or when the magnetic field changes. By aligning the thumb, index finger, and middle finger of the left hand in the proper orientation, one can determine the direction of the induced current based on the direction of the magnetic field and the motion of the conductor.
5. What are some practical applications of the force on a current-carrying conductor in a magnetic field?
Ans. The force on a current-carrying conductor in a magnetic field is the principle behind many electrical devices. Some practical applications include electric motors, where the force causes the rotor to rotate, and loudspeakers, where the force causes the diaphragm to vibrate and produce sound. Transformers also utilize this force to transfer electrical energy between different voltage levels.
105 videos|457 docs|112 tests
Download as PDF
Explore Courses for Class 10 exam
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
10M+ students study on EduRev
Download the FREE EduRev App
Track your progress, build streaks, highlight & save important lessons and more!
Related Searches

Objective type Questions

,

Force on a Current Carrying Conductor & Fleming's Left & Right Hand Rule | Science Class 10

,

Force on a Current Carrying Conductor & Fleming's Left & Right Hand Rule | Science Class 10

,

Extra Questions

,

study material

,

Important questions

,

Previous Year Questions with Solutions

,

Sample Paper

,

practice quizzes

,

Exam

,

video lectures

,

Force on a Current Carrying Conductor & Fleming's Left & Right Hand Rule | Science Class 10

,

Free

,

pdf

,

shortcuts and tricks

,

MCQs

,

Semester Notes

,

Summary

,

past year papers

,

ppt

,

Viva Questions

,

mock tests for examination

;