Comprehensive Physics Problem Set

Summary:

The Comprehensive Physics Problem Set features over a hundred solved problems derived from various branches of physics. Its purpose is to provide students with a vast array of practice material that spans a multitude of crucial topics such as Electromagnetic Induction, Electric Charges and Fields, Electrostatic Potential, Current and Electricity, Moving Charges and Magnetism, Magnetism and Matter, Alternating Current, and Electromagnetic Waves.

The note is structured in such a way that it will not only serve as an extensive review of these topics but also as a practical tool for students to enhance their understanding of the concepts. By working through these solved problems, students will get the opportunity to apply the theoretical knowledge they have acquired. This hands-on approach will significantly improve their problem-solving abilities and help them to internalize the principles and theories of physics more effectively.

Excerpt:

Comprehensive Physics Problem Set

Electromagnetic Induction
Question1.
Predict the direction of induced current in the situations described by the following Figs. 6.18(a) to (f).

Comprehensive Physics Problem Set

Answer:
o According to Lenz’s law, the end of the coil facing the S-pole of the magnet will behave as the south pole of the magnet.
o The current induced in the coil will flow clockwise when the magnet side is considered. The current flows from (qrpq).
o When the magnet moves in the direction according to Lenz’s law, the South Pole is developed at end q as well as at end X.
o Therefore, the induced current in the two coils (coil PQ and coil XY) should flow clockwise when the magnetic side is considered.
o Therefore, the induced current will flow in the direction prqp in coil pq and in coil XY, the induced current will flow in the direction YZXY.
o By Lenz’s law, the induced current in the right loop will be along XYZ.
o By Lenz’s law, the induced current in the left loop will be ZYX.
o By Lenz’s law, the induced current in the right coil will be XrY.
o The current flowing through the straight conductor produces the circular magnetic field, which lies in the plane of the loop.
o As no flux is linked with the loop so no current is induced in the loop.