Question
Mon February 21, 2011 By: Bhanu Mishra

Answer the following:- (1)State Fleming's left & right hand rule? (2)What is background radiation?

Expert Reply
Mon February 21, 2011

Dear student

Pls. post each question individually.

Fleming's left hand rule (for electric motors) shows the direction of the thrust on a conductor carrying a current in a magnetic field.

The left hand is held with the thumb, index finger and middle finger mutually at right angles. The First finger represents the direction of the magnetic Field. (north to south)
The Second finger represents the direction of the Current (the direction of the current is the direction of conventional current; from positive to negative).
The Thumb represents the direction of the Thrust or resultant Motion.

 

 

Fleming's right hand rule (for generators) shows the direction of induced current when a conductor moves in a magnetic field.

The right hand is held with the thumb, first finger and second finger mutually perpendicular to each other (at right angles),

The Thumb represents the direction of Motion of the conductor.
The First finger represents the direction of the Field. (north to south)
The Second finger represents the direction of the induced or generated Current (the direction of the induced current will be the direction of conventional current; from positive to negative).

 

Background radiation is radiation that is constantly present in the environment and is emitted from a variety of natural and artificial sources.

 

Hope this clarifies your doubt.

regards

Team

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