Unfortunately, ProtonMan did not realize that CaptainShield also watched his video blogs so he knew that ProtonMan had planned to fly past CaptainShields right hand side, at a distance of about 2.5 m (just close enough so he could see CaptainShields dumb surprised face). CaptainShield, still knowing ProtonMans mass (100 kg), velocity (50 m/s), and charge (4 mC) decided to lay a trap. His trap included laying down a plate which emits a uniform magnetic field. CaptainShield wanted his trap to force ProtonMan to spin around him in a circular path, allowing CaptainShield ample time to laugh and gloat before arresting ProtonMan. What magnetic field strength and direction should CaptainShields plate emit?
The concept used in this question is of magnetic force acting on a protona man moving with velocity v in presence of magnetic field along the center , as this force acts along the center which provides the necessary centrepetal force required for the proton man to move in the circular path .
Magnetic field direction is out of page which is denoted by dot in figure .
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