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CBSE Class 12 Physics 2014 Delhi Set 1 Paper

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Question : 7
Total: 30
Write the expression, in a vector form, for the Lorentz magnetic force
→
F
 due to a charge moving the velocity
→
v
 in a magnetic field
→
B
. What is the direction of the magnetic force?
Solution:  
The Lorentz force can be determined by the formula,
F=q(v×B)
where q is the charge, v is the velocity and B is the magnetic field density. Lorentz force is Perpendicular to both magnetic field and velocity. The right-hand thumb rule is applicable in determining the Lorentz force.
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