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What happens to the force experienced by a current carrying conductor placed in a uniform magnetic field, when placed
(a) parallel to magnetic field?
(b) perpendicular to magnetic field?
Whenever a current carrying conductor is placed in a uniform magnetic field. It will experience a magnetic force. However, the magnetic force depends on various parameters. Hence the magnetic force depends on four things:
•Amount of current
•Strength of Magnetic field
•Length of the wire which remain in magnetic field
•And the angle between the current carrying conductor and magnetic field.
The most important criteria here is the angle between the current carrying conductor and the magnetic field. If the angle is 0° or 180° then there will be no force acting on the wire. But if the angle is 90° the force will be maximum. If you observe the pattern it goes on like that, at 0° the force is 0 but as the angle increases the force increases and at 90° the force reaches its maximum value. And then again it starts decreasing and it becomes 0 at 180°. Hence,
(a) parallel to magnetic field
When the current carrying wire is placed parallel or anti-parallel to the magnetic field the magnetic field does not act on it.
(b) perpendicular to magnetic field
When the current carrying conductor is placed perpendicular to the magnetic field then magnetic force acting on conductor is maximum.
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?