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Q27
(CISF/2018)
Science & Technology › Basic Science (Physics, Chemistry, Biology)
Which one of the following determines the direction of induced current ?
Explanation
The direction of induced current is determined by Fleming's Right Hand Rule. According to this rule, if the thumb, forefinger, and middle finger of the right hand are stretched mutually perpendicular to each other such that:
- The forefinger points in the direction of the magnetic field.
- The thumb points in the direction of the motion of the conductor.
- Then, the middle finger points in the direction of the induced current.
In contrast, Fleming's Left Hand Rule is used to find the direction of force acting on a current-carrying conductor in a magnetic field (motor effect). The Right hand thumb rule (Maxwell's rule) is used to determine the direction of magnetic field lines around a straight current-carrying conductor. Feynman's left hand rule is not a standard principle for determining induced current direction in classical electromagnetism.
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