Question number 15
Dear student
Whenever a current-carrying conductor is placed in a magnetic field, it experiences a force due to the magnetic field. The direction of force acting on the conductor can be found out using Fleming's Left Hand Rule. The middle finger points in the direction of the current, index finger in the direction of the magnetic field, the thumb would point in the direction of the force on the conductor by magnetic field.
The direction of the magnetic force is rightwards (point your left thumb to right direction). Direction of current is from front wall to back wall, hence point your middle finger accordingly (direction of current is opposite to direction of flow of electron which is back to front here). Now, your index finger automatically points at downward direction, which is the direction of magnetic field.
Hence, direction of magnetic field is vertically downwards.
Regards
Whenever a current-carrying conductor is placed in a magnetic field, it experiences a force due to the magnetic field. The direction of force acting on the conductor can be found out using Fleming's Left Hand Rule. The middle finger points in the direction of the current, index finger in the direction of the magnetic field, the thumb would point in the direction of the force on the conductor by magnetic field.
The direction of the magnetic force is rightwards (point your left thumb to right direction). Direction of current is from front wall to back wall, hence point your middle finger accordingly (direction of current is opposite to direction of flow of electron which is back to front here). Now, your index finger automatically points at downward direction, which is the direction of magnetic field.
Hence, direction of magnetic field is vertically downwards.
Regards