Free NEET Mock Tests for Alternating Current
Spark your NEET success with Onlineneetcoaching.in’s free Alternating Currents mock tests! This pivotal Physics chapter, carrying 2 questions (8 marks), explores peak/RMS values, LCR series circuits, resonance, power, wattless current, AC generators, and transformers. Aligned with NCERT Class 12, our extensive collection of expert-crafted MCQs from a 25,000+ question bank preps you for questions like “What’s the power factor?” or “Calculate RMS voltage.” No signups, no fees—just instant practice to master impedance and resonance curves. Dive in and charge up your Physics score!
NEET Exam Alternating Currents Syllabus: What You Need to Know
Alternating Currents is a high-impact Physics chapter in NEET Exam, contributing 2 questions (8 marks) to the 180-question exam. Mastering this NCERT Class 12 topic can boost your Physics score, as it tests both conceptual understanding and numerical skills. The syllabus focuses on practical applications like LCR circuits and transformers, with a strong emphasis on calculations like RMS values and power factors. Below is the complete syllabus, aligned with NEET Exam, excluding dropped topics like LC oscillations (qualitative treatment).
- Alternating Currents: Understand AC vs. DC, sinusoidal waveforms, and time-varying voltage/current.
- Peak and RMS Value of Alternating Current/Voltage: Calculate peak (\( V_p \)) and RMS (\( V_{rms} = \frac{V_p}{\sqrt{2}} \)) values for voltage and current.
- Reactance and Impedance: Study inductive (\( X_L = \omega L \)) and capacitive (\( X_C = \frac{1}{\omega C} \)) reactance, and impedance (\( Z = \sqrt{R^2 + (X_L - X_C)^2} \)) in AC circuits.
- LCR Series Circuits: Analyze voltage, current, and phase differences in LCR circuits, including phasor diagrams.
- Resonance: Master resonance frequency (\( f_r = \frac{1}{2\pi \sqrt{LC}} \)) and quality factor in LCR circuits.
- Power in AC Circuits: Calculate average power (\( P = V_{rms} I_{rms} \cos\phi \)) and power factor (\( \cos\phi \)).
- Wattless Current: Understand non-power-consuming current components in inductive/capacitive circuits.
- AC Generator: Learn the working principle, EMF generation, and applications.
- Transformer: Study step-up/step-down transformers, efficiency, and energy losses.
Note: LC oscillations (qualitative treatment) was dropped from the NEET syllabus in previous years, so focus only on the above topics to stay exam-ready.
Top Study Tips to Ace Alternating Currents for NEET Exam
Alternating Currents can be tricky due to its mix of theory and numericals, but with targeted practice, you can secure those 8 marks. Our tips, crafted from Onlineneetcoaching.in’s 25,000+ question bank, help you tackle NEET-level challenges like calculating resonance frequency or power in LCR circuits. Here’s how to master this chapter:
- Memorize Key Formulas: Nail RMS (\( V_{rms} = \frac{V_p}{\sqrt{2}} \)), impedance (\( Z = \sqrt{R^2 + (X_L - X_C)^2} \)), and resonance (\( f_r = \frac{1}{2\pi \sqrt{LC}} \)) formulas. Practice applying them in numericals, like “Find \( V_{rms} \) for a 220 V peak voltage.”
- Master Phasor Diagrams: Visualize LCR circuits with phasors to understand phase differences. NEET often asks, “What’s the phase angle in an LCR circuit?” Use our mock tests to practice.
- Focus on Resonance: Resonance is a favorite NEET topic. Solve questions like “Calculate the resonance frequency for \( L = 0.1 \, H \), \( C = 10 \, \mu F \).” Understand sharpness of resonance via quality factor.
- Understand Power Concepts: Grasp power factor (\( \cos\phi \)) and wattless current for questions like “Find the average power in an AC circuit.” Our MCQs simplify these with step-by-step solutions.
- Practice Transformer Numericals: Solve problems on efficiency and voltage ratios, e.g., “A transformer steps up 220 V to 1100 V. Find the current ratio.” Use our tests to build speed.
- Use Visuals: Study diagrams like LCR circuits or AC generator cycles to clarify concepts. Our mock tests include visuals to reinforce learning, similar to NEET’s diagram-based questions.
- Time Your Practice: NEET gives ~1 minute per question. Take our timed mock tests to solve “What’s the impedance?” in under 60 seconds, boosting exam readiness.
With these tips, you’ll turn Alternating Currents into a scoring opportunity. Start practicing with our free mock tests below!
Alternating Currents Mock Test FAQs
What topics are covered in the NEET Exam Alternating Currents mock tests?▶
Onlineneetcoaching.in’s free NEET Exam Alternating Currents mock tests cover peak/RMS values, reactance/impedance, LCR series circuits, resonance, power, wattless current, AC generators, and transformers, fully aligned with NCERT Class 12.
How many questions come from Alternating Currents in NEET?▶
NEET typically includes 2 questions (8 marks) from Alternating Currents, testing concepts like LCR resonance, power factor, and transformer efficiency. Our mock tests help you secure every mark!
Are LC oscillations part of the NEET Exam Alternating Currents syllabus?▶
No, LC oscillations (qualitative treatment) was dropped from the NEET syllabus in previous years. Our mock tests focus only on current topics like LCR circuits and transformers, per NCERT Class 12.
How do I calculate RMS values for NEET questions?▶
Use \( V_{rms} = \frac{V_p}{\sqrt{2}} \) for voltage and \( I_{rms} = \frac{I_p}{\sqrt{2}} \) for current. For example, a 220 V peak voltage has \( V_{rms} = \frac{220}{\sqrt{2}} \approx 155.56 \, V \). Practice with our mock tests!
What’s the resonance frequency in LCR circuits?▶
Resonance occurs at \( f_r = \frac{1}{2\pi \sqrt{LC}} \). For \( L = 0.1 \, H \), \( C = 10 \, \mu F \), calculate \( f_r \approx 159.15 \, Hz \). Our MCQs drill this formula with NEET-style problems.
How does power factor affect AC circuits in NEET?▶
Power factor (\( \cos\phi \)) determines real power (\( P = V_{rms} I_{rms} \cos\phi \)). NEET questions like “Find the power factor for \( Z = 5 \Omega \), \( R = 3 \Omega \)” test this. Our tests simplify it!
What’s wattless current in Alternating Currents?▶
Wattless current is the non-power-consuming component in inductive/capacitive circuits, proportional to \( I_{rms} \sin\phi \). Practice NEET questions like “Calculate wattless current” with our mock tests.
How do AC generators work in NEET syllabus?▶
AC generators convert mechanical energy to EMF via electromagnetic induction, producing sinusoidal voltage. NEET may ask, “What’s the EMF equation?” Our MCQs cover this with diagrams.
Why are transformers important for NEET Exam?▶
Transformers test voltage/current ratios and efficiency, e.g., “A step-up transformer has a 1:5 ratio. Find output voltage.” Our mock tests drill these numericals for exam success.
How do Onlineneetcoaching.in’s mock tests help with NEET prep?▶
Our free Alternating Currents mock tests, drawn from a 25,000+ question bank, mimic NEET’s difficulty, offer instant feedback, and include visuals like phasor diagrams. Practice anytime, no signup needed!