Write one application of each of the following:
(a) Right-Hand Thumb Rule
(b) Fleming’s Left-Hand Rule
(c) Fleming’s Right-Hand Rule
Answers
a) right hand thumb rule is used to identify the direction of the magnetic field lines around a current carrying conductor
b) left hand rule is used to determine the direction of the motion of a current carrying conductor in a magnetic field
eg. electric motor
c) right hand rule is used to determine the direction of the induced current.
eg. electric generator
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(a) Direction of torque
(b) DC motor
(c) AC generator
Explanation:
Right-Hand Thumb Rule: Thumb rules state that if thumb of the right hand points along direction of current, then the remaining curled , fingers of same hand gives the direction of the magnetic field due to the current. Application: Direction of torque.
Fleming's left hand rule: Stretch the thumb, forefinger and middle finger of your left hand such that they are mutually perpendicular. If the forefinger points in the direction of magnetic field and the middle finger in the direction of current, then the thumb will points in the direction of motion or the force acting on the conductor. Application: D. C. motor.
Fleming's right-hand rule shows the direction of induced current when a conductor attached to a circuit moves in a magnetic field. It can be used to determine the direction of current in a generator's windings.
Application: A. C. generator.