Proven Strategies to Ace JEE Main Mock Tests on Electromagnetic Induction & AC
Electromagnetic Induction and Alternating Currents is a high-weightage chapter in JEE Physics, linking core concepts like Faraday’s Law, Lenz’s Law, AC circuits, and transformers. Mastering this chapter is essential for solving both conceptual and advanced numerical questions in the exam. Take this mock test now to strengthen your understanding and boost your confidence for JEE Main 2025!
Mock Test Instructions for the Electromagnetic Induction And Alternating Currents Mock Test 1-2:
- 20 questions from Electromagnetic Induction And Alternating Currents
- Time limit: 20 minutes
- Single correct answer per question
- Correct answers appear in bold green after submission
How Can JEE Mock Tests Help You Master Electromagnetic Induction and Alternating Currents?
- Identify and fix misconceptions in Faraday’s and Lenz’s Law through targeted practice questions.
- Improve conceptual clarity by applying electromagnetic induction principles in problem-solving scenarios.
- Build speed and accuracy for AC circuit analysis using timed mock tests.
- Master transformer and eddy current concepts by tackling varied MCQs modeled on JEE Main pattern.
- Mock test analysis helps pinpoint weak areas before the actual JEE Physics exam.
Master Key Laws and AC Circuits with Expert-Designed Electromagnetic Induction JEE Mock Tests
- Practice numericals on induced emf, mutual and self-inductance to boost your problem-solving technique.
- Utilize mock tests to get familiar with question styles from previous JEE Mains on electromagnetic induction and AC.
- Test readiness for frequency, rms value, and phase relationship questions in AC circuits.
- Analyze mistakes in transformer and core loss calculations for improvement.
- Reinforce memory of formulas on AC, eddy currents, and laws through repeated self-assessment.
Subject-Wise Excellence: JEE Main Mock Test Links
| S.No. | Subject-Specific JEE Main Online Mock Tests |
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| 1 | Online FREE Mock Test for JEE Main Chemistry |
| 2 | Online FREE Mock Test for JEE Main Maths |
| 3 | Online FREE Mock Test for JEE Main Physics |
Important Study Materials Links for JEE Exams
FAQs on Electromagnetic Induction and Alternating Currents Mock Test for JEE Main 2025-26 Preparation
1. What is electromagnetic induction?
Electromagnetic induction is the process by which a changing magnetic field within a closed loop induces an electric current or emf (electromotive force). This concept, discovered by Michael Faraday, is the principle behind many electrical devices, including generators and transformers.
2. State Faraday’s laws of electromagnetic induction.
Faraday’s First Law states that whenever the magnetic flux linked with a closed circuit changes, an emf is induced in the circuit.
Faraday’s Second Law states that the magnitude of the induced emf is directly proportional to the rate of change of magnetic flux through the circuit.
3. What is Lenz’s law and its significance?
Lenz's law states that the direction of induced current is such that it opposes the change in magnetic flux that produced it. This law confirms the conservation of energy by preventing a violation of the law with perpetual movement.
4. What are the main applications of electromagnetic induction?
Major applications of electromagnetic induction include:
- Electrical generators
- Transformers
- Induction cooktops
- Electric bells
- Wireless charging devices
5. What is the difference between self-induction and mutual induction?
Self-induction occurs when a changing current in a coil induces an emf in the same coil. In contrast, mutual induction takes place when a changing current in one coil induces an emf in a neighboring coil placed nearby or wound on the same core.
6. How is AC (alternating current) generated using electromagnetic induction?
AC is generated by rotating a coil within a magnetic field or vice versa. The changing orientation of the coil relative to the magnetic field continuously changes the magnetic flux through the coil, leading to an alternating emf and thus alternating current in the circuit.
7. Define magnetic flux and its SI unit.
Magnetic flux is the measure of the number of magnetic field lines passing through a given surface area. Its SI unit is the weber (Wb).
8. What are eddy currents? How are they reduced in electrical appliances?
Eddy currents are circular electric currents induced within conductors by a changing magnetic field. They lead to energy loss as heat. In electrical appliances, they are minimized by using laminated cores or insulating coatings, which interrupt the paths of eddy currents.
9. Explain the principle of a transformer.
A transformer works on the principle of mutual induction. It consists of two coils, the primary and secondary, wound over a common iron core. When alternating current flows in the primary coil, it creates a varying magnetic flux, which induces an emf in the secondary coil.
10. What factors affect the magnitude of induced emf in a coil?
The induced emf in a coil depends on:
- The rate of change of magnetic flux
- The number of turns in the coil
- The area of the coil
- The strength of the magnetic field
11. What is the importance of slip rings in AC generators?
Slip rings are used in AC generators to provide continuous transfer of generated alternating current from the rotating coil to the external circuit, allowing free rotation without twisting the connecting wires.
12. What is Fleming's Right-Hand Rule?
According to Fleming’s Right-Hand Rule, hold the thumb, forefinger, and middle finger of the right hand mutually perpendicular to each other. If the forefinger points in the direction of the magnetic field, the thumb in the direction of motion of the conductor, then the middle finger points in the direction of the induced current.
