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Which of the following statements is/are correct? Statements: I) A current carrying conductor acts like a magnet. II) Moving electrons perpendicular to the magnetic field do not experience any force.
Statement I only
Statement II only
Neither Statement I nor II
Both Statements I and II
Statement I only
Statement I is correct because an electric current produces a magnetic field around the conductor, a phenomenon known as electromagnetism. Statement II is incorrect because moving charges perpendicular to a magnetic field experience the maximum Lorentz force according to the right-hand rule.
Statement I is correct because an electric current produces a magnetic field around the conductor, a phenomenon known as electromagnetism. Statement II is incorrect because moving charges perpendicular to a magnetic field experience the maximum Lorentz force according to the right-hand rule.
Think of a motor; the electric current flowing through the wire coils reacts with the magnet to create physical motion, proving that the moving charge definitely experiences a force.
Use 'FBI' for Fleming's Left-Hand Rule: F = Force (Thumb), B = Magnetic Field (Index finger), I = Current (Middle finger).
F=q(v├ЧB) тАФ Lorentz force on a moving charge
F=BIlsin(╬╕) тАФ Force on a current-carrying conductor in a magnetic field
When a charge q moves with velocity v in a magnetic field B, it experiences a force given by the Lorentz force law F=q(v├ЧB). The magnitude is F=qvBsin(╬╕), where ╬╕ is the angle between velocity and the magnetic field. When ╬╕=90┬░, sin(90┬░)=1, resulting in maximum force, not zero.
Oersted's experiment proved that electric current creates a magnetic field.
The magnetic force on a charge is zero only when it moves parallel or anti-parallel to the magnetic field (╬╕=0┬░ or 180┬░).
Magnetic force always acts perpendicular to both the velocity of the charge and the magnetic field.
Fundamental principle behind electric motors and generators.
Electromagnets in cranes
Electric motors in home appliances
The SI unit of magnetic field strength is Tesla (T).
Option B is incorrect because perpendicular motion is the condition for maximum force, not zero force.
A is correct тАФ Only Statement I is scientifically accurate, as current-carrying conductors produce magnetic fields, while perpendicular motion of charges in a field results in maximum force.
Always remember that for force to be zero in a magnetic field, the charge must be stationary or move parallel to the field lines; never perpendicular.
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