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RESPECT FOR WOMEN IS PARAMOUNTNetworking
Magnetic Force on a Current-Carrying Wire
Force = Current x Length x B-field
A current carrying conductor placed in a magnetic field experiences a force. If the direction of the field and that of current are mutually perpendicular to each other, then the force acting on the conductor will be perpendicular to both and that can be determined using the Fleming’s left-hand rule. When current establishes in the conductor, it gets displaced which verifies the existence of a force on the conductor.
Fig. (1) – A current-carrying rod, AB, experiences a force perpendicular to its length and the magnetic field
Source: NCERT class X lab manual
Fleming’s Left Hand Rule:
Fig. (2) – Fleming’s left hand rule.
Source: NCERT class X lab manual
Hold the thumb and the first two fingers of your left hand mutually at right angles to each other as shown in Fig. (2). Then if the Forefinger points in the direction of the Field, and the second finger in the direction of the Current, the thumb will point in the direction of Force.
Factors affecting magnetic force on a current-carrying conductor in a magnetic field:
F=BIlsinθ
F=BIlsinθ, where
l
is length of conductor,
θ
is angle that conductor makes with the magnetic field.
When the conductor is perpendicular to the magnetic field, the force will be maximum. When it is parallel to the magnetic field, the force will be zero.
ASSIGNMENT : FORCE ON A CURRENT CARRYING CONDUCTOR ASSIGNMENT MARKS : 10 DURATION : 1 week, 3 days