1.Imagine that you are sitting in a chamber with your back to one wall.
A proton beam, moving horizontally from back wall towards the front
wall, is deflected by a strong magnetic field to your left side. What is
the direction of magnetic field? State the rule applied to find the
direction of magnetic field. (2mark)
Answers
Answer:
According to Fleming’s left hand rule, if we stretch the forefinger, middle finger and the thumb of the left hand in mutually perpendicular directions. If the direction of the field is represented by the forefinger and the direction of current is represented by the middle finger then the direction of force the conductor will be represented by the thumb on.
We know that the direction of the electron beam is in a straight line from the back wall towards the front wall. The direction of current will be in the opposite direction of the flow of electrons. Therefore the direction of current will be in a straight line from the front wall to the back wall. Since the electron beam has deflected to your right side, the direction of force is towards your right side.
By applying Fleming’s left hand rule, if the thumb represents the force and the middle finger represents the current, then the field will be given by the direction of the forefinger and it will be in a downward direction.
The field will be in a downward direction.
Explanation: