Question

According to Ampere's swimming rule, if a man swims along a direction opposite to the direction of the current, south pole of the needle deflects towards his_______

Answer 1

To answer this question we must know the Ampere’s swimming rule. It’s better to understand and memorize this simple rule to answer this.
Ampere's swimming rule states that, if a swimmer swims in a direction of current facing a magnetic needle, then the north pole of the magnetic field deflects towards his left hand and south pole towards his right hand.
Hence the answer is “left hand”.

Additional information:
This rule can also be remembered with the help of the word 'SNOW'. It means that if current is flowing from south to north direction then the North pole deflected toward east.
The magnetic field in Ampere's swimming rule, a neighborhood vector field of a magnet, electrical current, or changing electric field, where magnetic forces can be observed. Magnetic fields like Earth's allow magnetic compass needles and other permanent magnets to converge with the direction of the field. Magnetic fields cause the electrically charged particles to travel in a circular or helical direction. This force — exercised in a magnetic field on electric currents in wires — undermines the operation of electric motors.
The magnetic field is stationary and is referred to as a magnetostatics field around a permanent magnet or a wire carrying a steady electric current in one direction. Its magnitude and trajectory remain similar at any given point. The magnetic field continuously changes its amplitude and direction around an alternating current or a fluctuating direct current.
Continuous lines of force or magnetic flux will reflect magnetic fields that arise from north-seeking magnetic poles and join magnetic poles in the south. The line length represents the frequency of the magnetic field. Of example, at the poles of a magnet, where the magnetic field is high, the field lines are clustered together, or denser. Farther out, they fan out where the magnetic field is high, becoming less compact. A unified magnetic field is defined by parallel straight lines which are evenly spaced. Flux orientation is the orientation a feeble magnet points to the north-seeking pole in. The flux lines are continuous, which form loops that are closed. We emerge for a bar magnet from the north-seeking pole, fan out and out, touch the magnet at the south-seeking pole and fly across the magnet to the north pole, where we surface again.

Note:
The SI unit of the magnetic flux is the weber. Weber is a measure of the total number of field lines that traverse a given area.