Physics Tutor in Vile Parle West Mumbai – Learn Faraday’s Law, Lenz’s Law and Conservation of Energy with Kumar Sir
+91-9958461445
If you live in Vile Parle West Mumbai and you are preparing for NEET, IIT JEE, CBSE, ICSE, IB, IGCSE, A-Level, AP Physics or Edexcel Physics, then you already know one thing very clearly: Physics is not a subject of memorising formulas only. Physics is a subject of concepts, imagination, logic and proper reasoning.
Many students in Vile Parle West attend good schools, live in educated families and have access to books, coaching material, YouTube videos and assignments. Still, when a real conceptual question comes in the exam, the mind becomes blank. The reason is simple: the student has read the formula, but the student has not understood the soul of the concept.
Take one beautiful example from Electromagnetic Induction: Lenz’s Law is a consequence of conservation of energy.
Many students simply write this line in the notebook, but they do not feel it. Kumar Sir explains this concept in a very natural way.
Suppose a magnet is kept near a conducting ring. If the magnet is simply kept at rest, no current is induced in the ring. Why? Because there is no change in magnetic flux. Faraday’s Law says that induced emf is produced only when magnetic flux changes with time.
Now move the magnet towards the ring. The magnetic flux linked with the ring changes. Current is induced. But the direction of induced current is such that it opposes the cause which produced it. This is Lenz’s Law.
Now the real question comes: why does it oppose?
Because if the induced current helped the motion of the magnet, then energy would be created without effort. That would violate conservation of energy. Nature does not allow free energy. You must do work to produce current.
This is like the principle: Karmanye vadhikaraste ma phaleshu kadachana — you have control over your action, not over the result. In Physics also, without action there is no result. If you do not move the magnet, no current comes. If you move it, you do work, and that work appears as electrical energy and heat energy in the circuit.
This is the beauty of Physics. A simple magnet and ring can teach conservation of energy, Faraday’s Law, Lenz’s Law, induced current, magnetic flux and the deep logic of nature.
Kumar Sir teaches Physics in this style. He does not only say, “write the formula.” He explains why the formula exists, where it comes from, what nature is doing and how the examiner can twist the question.
For example, in a balanced Wheatstone bridge, students often only remember the condition:
P/Q = R/S
But Kumar Sir explains why no current flows through the galvanometer branch when the bridge is balanced. He connects it with potential difference, current distribution and Kirchhoff’s laws. Once the concept is clear, the student can solve any variation.
That is why students from Vile Parle West Mumbai who are struggling in Physics should take proper personal guidance. If Physics is weak, then chapters like Current Electricity, Magnetism, Electromagnetic Induction, AC, Waves, SHM, Optics and Modern Physics become very difficult. But if the concept is crystal clear, the same chapters become scoring.
Kumar Sir focuses on:
Concept clarity
Numerical practice
NEET Physics problem solving
IIT JEE Physics reasoning
CBSE board exam preparation
IB Physics explanation
IGCSE Physics support
A-Level and AP Physics guidance
Step-by-step doubt solving
Exam-oriented preparation
If you are searching for a personal Physics tutor in Vile Parle West Mumbai, you can contact Kumar Physics Classes.
Contact Kumar Sir: +91-9958461445
Website: kumarphysicsclasses.com
Email: kumarsirphysics@gmail.com
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Physics is not difficult when it is taught properly. It becomes difficult only when students are forced to memorise without understanding. Kumar Sir makes every concept crystal clear from the root, so that students can solve questions with confidence.
Law of Conservation of Energy
1. What is the law of conservation of energy?
Energy can neither be created nor destroyed. It only changes from one form to another.
2. Why is this law called universal?
Because it is valid in mechanics, heat, electricity, magnetism, nuclear physics and daily life.
3. Does energy disappear when a ball stops?
No. Its kinetic energy changes into heat, sound and deformation energy.
4. Why does a pendulum slow down in air?
Mechanical energy is converted into heat due to air resistance and friction at the support.
5. Is energy conserved in a falling body?
Yes. Potential energy decreases and kinetic energy increases, but total mechanical energy remains constant if air resistance is ignored.
6. Why does speed increase while falling?
Gravitational potential energy converts into kinetic energy.
7. Why does speed decrease while going upward?
Kinetic energy converts into gravitational potential energy.
8. Is mechanical energy always conserved?
No. It is conserved only when non-conservative forces like friction are absent.
9. Is total energy conserved when friction acts?
Yes. Mechanical energy decreases, but total energy remains conserved because heat is produced.
10. Why does friction produce heat?
Work done against friction converts ordered mechanical energy into random molecular motion.
11. Why is Lenz’s law based on conservation of energy?
If induced current helped the cause, energy would be produced without work. That is impossible.
12. Why is work needed to move a magnet near a coil?
The induced current opposes the motion, so external work is required. This work becomes electrical energy.
13. Does a stationary magnet near a coil produce current?
No. Magnetic flux does not change, so no induced emf is produced.
14. What happens when a magnet moves toward a coil?
Changing flux produces induced current, and the coil opposes the motion of the magnet.
15. Why can’t we get free electricity from a magnet and coil?
Because motion requires work. Energy output comes from external work input.
16. Why does a roller coaster move fast at the bottom?
At the bottom, potential energy is minimum and kinetic energy is maximum.
17. Why does a roller coaster slow down at the top?
Kinetic energy converts into potential energy.
18. Can kinetic energy be negative?
No. Kinetic energy is always positive or zero because it depends on square of speed.
19. Can potential energy be negative?
Yes. Potential energy depends on chosen reference level.
20. Why is total energy important in Physics?
It helps solve problems without directly calculating force and acceleration at every point.
21. Why is energy method useful in SHM?
Because total energy remains constant and changes between kinetic and potential energy.
22. In SHM, where is kinetic energy maximum?
At mean position, because speed is maximum there.
23. In SHM, where is potential energy maximum?
At extreme position, because displacement is maximum there.
24. In SHM, where is total energy maximum?
Total energy remains constant at all positions if damping is absent.
25. Why does a compressed spring store energy?
Work done in compressing the spring is stored as elastic potential energy.
26. What happens when a compressed spring is released?
Elastic potential energy converts into kinetic energy.
27. Why does a bouncing ball not reach the same height?
Some energy is lost as heat, sound and deformation during collision.
28. Is energy conserved in collision?
Total energy is conserved, but kinetic energy may or may not be conserved.
29. What is elastic collision?
A collision in which both momentum and kinetic energy are conserved.
30. What is inelastic collision?
A collision in which momentum is conserved but kinetic energy is not conserved.
31. Where does lost kinetic energy go in inelastic collision?
It changes into heat, sound and internal energy.
32. Why does a bullet heat a target?
The bullet’s kinetic energy converts into heat and deformation energy.
33. Why does water at a dam have energy?
Water at height has gravitational potential energy.
34. How does a hydroelectric plant work?
Potential energy of water converts into kinetic energy and then electrical energy.
35. Why does food give energy?
Chemical energy stored in food converts into muscular energy and heat.
36. Why does petrol run a car?
Chemical energy of petrol converts into heat and mechanical energy.
37. Is energy conserved in the human body?
Yes. Food energy converts into motion, heat and biological work.
38. Why does a fan stop after switching off?
Rotational kinetic energy converts into heat due to friction and air resistance.
39. Why does a moving vehicle heat its brakes?
Kinetic energy converts into thermal energy due to friction in brakes.
40. Why is perpetual motion impossible?
Because friction and losses always convert useful mechanical energy into heat.
41. Why does a satellite not need fuel continuously?
In ideal orbit, gravitational potential energy and kinetic energy exchange while total energy remains constant.
42. Why does escape velocity depend on energy?
A body must have enough kinetic energy to overcome gravitational potential energy.
43. Why is energy scalar?
Energy has magnitude only, not direction.
44. Can work be negative?
Yes. If force opposes displacement, work done is negative.
45. What does negative work mean?
It means energy is being removed from the body.
46. Why does gravity do positive work while falling?
Force and displacement are in the same direction.
47. Why does gravity do negative work while moving upward?
Force is downward while displacement is upward.
48. Why is conservation of energy powerful in exams?
It reduces long force-based calculations and gives direct relation between positions and speeds.
49. Why do students confuse energy conservation?
They think mechanical energy is always conserved, but actually total energy is always conserved.
50. How does Kumar Sir teach this chapter?
Kumar Sir connects formulas with real logic, diagrams, examples and exam-style reasoning so students understand the concept from the root.