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2 answers:
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Answer:
The correct option is 'c': The Force vector (F) and the magnetic field vector (B) are always perpendicular.
Explanation:
The magnetic force that acts on a charged particle moving in a magnetic field is given by
As we can see that vector cross product is involved hence we conclude that Force vector (F) is always perpendicular to both the velocity vector (v) and the magnetic field vector (B) which may be at any angle with respect to each other.
Hence we conclude that vectors F and B are always perpendicular.
Answer:
When one of charge is doubled, the magnitude of the force between them gets doubled.
Explanation:
The electric force between two electric charges is given by :
Here,
k is the electrostatic force
d is the separation between charges
are charges
If one of the charges is doubled in magnitude while maintaining the same separation between the charges,
New force becomes,
When one of charge is doubled, the magnitude of the force between them gets doubled. Hence, this is the required solution.