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State the rule to determine the direction of a
magnetic field produced around a straight conductor carrying current.
The direction of the magnetic field from a current carrying conductor is given by the Right-hand thumb rule. Explanation: According to Right-hand thumb rule:-
•When we place our right hand's thumb in the direction of the current and as we wrap our finger around the current carrying conductor.
•Wrapped finger will show the direction of the magnetic field.
•It is noticeable that the wrapped finger from a closed loop which is also the most important property of the magnetic field.
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?