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A charged particle moves in a clockwise direction in a magnetic field which is perpendicular to plane of paper directed downwards. What is the nature of charged particle?
In the presence of magnetic field, the force on a charged particle is given as:
F = q× v× B
Where, q is the charge of the particle
V is the velocity of the particle
B is the magnetic field.
Now, the direction of charged particle is clock wise.
And, the magnetic field is inwards (perpendicular to the plane of paper in downwards direction)
We apply Flemings left hand rule to find the direction for any charge:
The thumb represents the force acting or direction of motion.
•The fore finger represents the direction of magnetic field.
•The central finger represents the direction of propagation of the charge.
And for negative charges (i.e. electrons) that the final force direction should be taken the opposite of what Flemings rule.
Therefore, here the charge is negative i.e. the particle is an electron.
Therefore, the diagram is given below:
Mr. Sharma used to park his car in the basement of his house. One day in the morning he noticed that his basement is full of knee-deep water and its walls were wet because of the hours-long rain at night. When he entered the basement, he experienced a major shock. His father seeing him from outside, rushed to the main switch and switched it off and thus saved his life.
(a) Why Mr. Sharma experienced the shock?
(b) What precautions should Mr. Sharma take to avoid such incidences in future?
(c) Which qualities were shown by Mr. Sharma’s father?