MCAT Physical : Magnetism and Electromagnetism
Study concepts, example questions & explanations for MCAT Physical
All MCAT Physical Resources
Example Questions
Example Question #1 : Magnetic Forces And Energy
What is the magnitude of force on a 
The equation for finding the force on a charge in a magnetic field is
F = qvBsinθ
Where q is charge in coulombs, v is the velocity of the charge, and B is the strength of the magnetic field in Teslas. Since the charge is moving perpendicular to the magnetic field, sinθ =1. Therefore we solve for force by plugging in the values and multiplying.
Example Question #1 : Magnetic Forces And Energy
In a current-carrying wire, which of the following expressions best relates charge, current, velocity and the length of the wire?
Assume 
The force of a charge in a magnetic field is given by the equation 
Additionally, the force on a current-carrying carrying wire in a magnetic field is given by the equation 
Because we assume the angle to be 90o , we can set the two force equations equal to each other, and derive the equation 
By manipulating the variables, we can generate the equation 
Example Question #2 : Magnetic Forces And Energy
The particle depicted above on the left has a charge of 
It will move away from the observer
It will move upwards
It will move toward the observer
It will move downwards
It will slow to a halt
It will move away from the observer
To determine the direction the charge will accelerate, use the right hand rule for magnetic force. To begin, hold out your hand and give a "thumb up," now rotate your wrist 
Certified Tutor
All MCAT Physical Resources
