Key Concepts and Solved Examples of Electromagnetic Induction (Physics)
This page provides Electromagnetic Induction And Alternating Currents MCQ practice for NEET aspirants. These MCQs cover core concepts, application, and important formulas for high NEET Physics scores. Use the questions, answer key, and detailed explanations to boost speed, accuracy, and subject clarity for NEET-level performance.
What are MCQs for Electromagnetic Induction And Alternating Currents?
MCQs (Multiple Choice Questions) on Electromagnetic Induction and Alternating Currents test your understanding of Faraday’s laws, Lenz’s law, self and mutual induction, AC circuit analysis, resonance, and key numericals. Practicing these structured questions prepares you for NEET-style reasoning and application, ensuring quick recall and strong fundamentals.
Why Practice NEET MCQs?
Regularly solving NEET MCQs boosts exam confidence and accuracy. MCQ practice strengthens concept mastery, improves time management, and reveals weak areas. It also simulates real NEET exam conditions, crucial for excelling in Physics. For more targeted practice, access chapterwise NEET Physics MCQs or full syllabus mock tests from Vedantu.
Electromagnetic Induction And Alternating Currents MCQ Practice
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Which law states that the induced EMF is equal to the negative rate of change of magnetic flux?
A. Lenz’s law
B. Faraday’s first law
C. Faraday’s second law
D. Ampere’s law
-
When the magnetic flux through a coil changes from 5 Wb to 3 Wb in 0.5 s, what is the induced EMF?
A. 1 V
B. 2 V
C. 4 V
D. 10 V
-
The SI unit of inductance is:
A. Tesla
B. Weber
C. Henry
D. Farad
-
If the number of turns in a solenoid is doubled, its self-inductance becomes:
A. Half
B. Double
C. Four times
D. Remains unchanged
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Alternating current is represented as I = I0sin(ωt). What is the value of I when ωt = π/2?
A. 0
B. I0/2
C. I0
D. -I0
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Which device converts mechanical energy to electrical energy using electromagnetic induction?
A. Transformer
B. Generator
C. Galvanometer
D. Ammeter
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A coil of 100 turns and area 0.02 m² is perpendicular to a magnetic field of 0.5 T. What is the total flux?
A. 0.5 Wb
B. 1 Wb
C. 2 Wb
D. 5 Wb
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In an AC circuit containing only resistance R, the phase difference between voltage and current is:
A. π/2
B. 0
C. π
D. π/4
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The induced EMF in a conductor moving in a uniform magnetic field is zero when the direction of motion is:
A. Parallel to B
B. Perpendicular to B
C. At 45° to B
D. None of these
-
What is the average value of AC over one complete cycle?
A. 0
B. I0
C. √2 I0
D. I0/√2
-
The instantaneous current in an AC circuit is zero when the angle is:
A. 0
B. π/2
C. π
D. 3π/2
-
Eddy currents are produced when:
A. A conductor is kept in a steady magnetic field
B. A conductor moves parallel to a magnetic field
C. The magnetic flux through a conductor changes
D. No change in flux
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Which factor does NOT affect the self-inductance of a solenoid?
A. Number of turns
B. Core material
C. Length
D. Temperature
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In a pure inductive AC circuit, the current:
A. Lags voltage by 90°
B. Leads voltage by 90°
C. Is in phase with voltage
D. Opposes voltage
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If alternating voltage V = V0sin(ωt) is applied to a pure resistor, what is the expression for current?
A. (V0/R)sin(ωt)
B. (V0/L)sin(ωt)
C. (V0/C)cos(ωt)
D. (V0/R)cos(ωt)
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Which of the following is a consequence of Lenz’s law?
A. Conservation of energy
B. Conservation of charge
C. Conservation of mass
D. Conservation of momentum
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The resonance condition in an LCR series AC circuit is achieved when:
A. XL = XC
B. R = L
C. ω = RC
D. L = C
-
A step-up transformer changes:
A. Low voltage to high voltage
B. High voltage to low voltage
C. AC to DC
D. Frequency
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Which of the following measures alternating current?
A. Voltmeter
B. Moving coil galvanometer
C. Hot wire ammeter
D. Potentiometer
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If a coil’s magnetic flux changes by 0.1 Wb in 0.01 s, and it has 50 turns, what is the induced EMF?
A. 0.5 V
B. 5 V
C. 50 V
D. 500 V
MCQ Answer Key
| Q.No. | Answer | Explanation |
|---|---|---|
| 1 | C | Faraday’s second law relates EMF to rate of flux change. |
| 2 | B | EMF = |Δφ/Δt| = |3-5|/0.5 = 2/0.5 = 4 V (take magnitude). |
| 3 | C | Henry (H) is the SI unit of inductance. |
| 4 | C | Self-inductance ∝ (number of turns)2; so 2N means 4 times. |
| 5 | C | sin(π/2) = 1; so I = I0. |
| 6 | B | A generator uses electromagnetic induction for mechanical to electrical conversion. |
| 7 | C | Flux = NBA = 100 × 0.5 × 0.02 = 1 Wb. |
| 8 | B | In pure resistance, voltage and current are in phase (phase = 0). |
| 9 | A | EMF is zero if velocity is parallel to magnetic field lines. |
| 10 | A | Average value over a cycle is zero for pure AC. |
| 11 | B | sin(π/2) = 1; so current is at maximum, but I = 0 at θ = 0 or π. |
| 12 | C | Eddy currents arise from change in magnetic flux through conductor. |
| 13 | D | Temperature has negligible effect on inductance for most cases. |
| 14 | A | In pure inductor, current lags voltage by 90°. |
| 15 | A | Ohm’s law for resistor: I = V/R; V=V0sin(ωt). |
| 16 | A | Lenz’s law embodies energy conservation. |
| 17 | A | At resonance, XL = XC for LCR series circuit. |
| 18 | A | Step-up transformer increases voltage (primary to secondary). |
| 19 | C | Hot wire ammeter reads RMS value of AC. |
| 20 | B | EMF = N × Δφ/Δt = 50 × 0.1/0.01 = 50 × 10 = 500 V. |
Explanations clarify reasoning behind each answer and help students understand important NEET concepts.
How These MCQs Help in NEET
Practicing NEET-style Electromagnetic Induction And Alternating Currents MCQ sharpens your grasp of both theory and application. You become exam-ready, avoid common mistakes, and revise tough concepts effectively. For more advanced MCQ sets with detailed analytics, explore Vedantu’s important NEET Physics questions or previous year question papers.
Next Steps: Score Higher in NEET Physics
- Review MCQ explanations to fill knowledge gaps.
- Identify weak concepts and revisit those topics in Electromagnetic Induction revision notes.
- Practice more NEET Electromagnetism MCQs to build speed and reduce errors.
- Simulate timed tests with full Physics mock exams for best NEET results.
Consistent practice of Electromagnetic Induction And Alternating Currents MCQ leads to greater NEET Physics accuracy and faster recall. Using Vedantu’s resources and answer keys, you reinforce core principles for a strong Physics score. Master chapterwise MCQs to confidently tackle all NEET Physics challenges.
FAQs on Electromagnetic Induction And Alternating Currents MCQ for Students
1. What is the NEET Physics Electromagnetic Induction and Alternating Currents mock test?
The NEET Physics Electromagnetic Induction & Alternating Currents mock test is an exam-level practice resource featuring Physics MCQs on electromagnetic induction and alternating currents. It provides:
- Chapterwise questions similar to NEET
- Instant scoring and performance analytics
- Detailed answer keys with solutions
- Helps with targeted revision and last-minute exam prep
2. How many MCQ questions are included, and what is the exam format?
The test contains 25 MCQ questions covering NEET-relevant Physics topics on Electromagnetic Induction and Alternating Currents. The format includes:
- Single-answer type with 4 options
- Divided as: 10 from Electromagnetic Induction, 10 from Alternating Currents, 5 from mixed or application-based concepts
- Follows NEET 2025 pattern, negative marking applied
- Complete within 30–40 minutes for best simulation
3. Can I download an answer key for this test?
Yes, the answer key with step-by-step explanations becomes available after submitting the test. This helps students:
- Check all correct answers
- Understand solution steps and Physics concepts
- Revise weak areas before NEET
4. Are the questions similar to previous NEET papers?
Yes, questions in this mock test mirror the style, difficulty, and syllabus coverage seen in previous NEET Physics papers. You can expect:
- Conceptual and numerical MCQs
- NEET-aligned pattern and marking scheme
- Mix of direct formula-based and higher-order thinking skills questions
5. Is this mock test suitable for last-minute NEET revision?
This mock test is ideal for last-minute NEET Physics revision. It helps you:
- Quickly practice core formulas and concepts from EMI and AC
- Identify errors and topicwise gaps
- Boost confidence and exam readiness with instant analysis
6. How can I practice more NEET Physics MCQs online?
You can find more NEET Physics MCQ tests and chapterwise quizzes on reputed educational platforms. For maximum impact:
- Use chapter-specific tests for in-depth revision
- Attempt full syllabus mock exams for real NEET experience
- Review previous year question papers to understand trends
7. How accurate is the scoring and analytics provided after taking the test?
Scoring and analytics are instant and highly accurate, based on your responses. They provide:
- Questionwise results and overall score
- Percentile comparison with other NEET aspirants
- Topicwise breakdown of strengths and weaknesses
- Guidance for targeted revision
8. What should I do if I don’t understand a Physics solution in the answer key?
If a Physics solution is unclear in the answer key:
- Review the problem statement and given options carefully
- Study the stepwise explanation provided
- Check basic concepts from the Electromagnetic Induction or Alternating Currents chapters
- Discuss with a mentor or search for similar solved examples
9. Does the mock test simulate NEET negative marking and time constraints?
Yes, the mock test applies NEET-style negative marking (usually -1 for wrong answers) and advises a set time limit (30–40 minutes). This prepares you to manage:
- Careful question selection
- Proactive time management
- Strategic answering under pressure
10. Can I review only the MCQs I got wrong for targeted revision?
Yes, after test submission you can view and analyze all incorrectly answered MCQs. This targeted review:
- Helps reinforce weak Physics concepts
- Avoids similar mistakes in the NEET exam
- Guides focused revision sessions on EMI & AC
