Question

in dash appliance fleming left hand rule is not used

Answer 1

in electric fuse Fleming's left hand rule is not used

Answer 2

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Fleming's left hand rule states that forefinger represents the direction of the magnetic field, middle finger represents the direction of electric current and Thumb represent the direction of motion of the conductor or force of the conductor. Stretch the left hand such that the thumb, first finger and the central finger are mutually perpendicular to each other. If the first finger points in the direction of the magnetic field and the central symbol points in the direction of electric current, then the term will point in the direction of motion and force.

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Firstly fix a horseshoe magnet on the top of the table. Place a long and thin strip of aluminium on two wooden supports such that it passes between the North and South poles of the magnet. Connect a battery across the ends of the aluminium strip through a key or switch. now close the key or on the switch so that electric current flows through the strip.
You will observe that when current flows through the aluminium strip, it moves upward. If the direction of the current is reversed, the aluminium strip moves downward.