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Current Electricity is a essential topic in NEET Physics, covering concepts like Ohm’s Law, resistance, circuits, and strength. NEET questions on this topic test trouble-fixing skills regarding circuit evaluation, Kirchhoff’s legal guidelines, and the software of formulas related to modern-day, voltage, and resistance. Understanding standards like series and parallel circuits, electromotive pressure (EMF), and inner resistance is essential. Practicing these questions enhances your grasp of fundamental principles, allowing better preparation for NEET’s physics section.
- Introduction to Current Electricity for NEET
- Download: Current Electricity
- Key Concepts in Current Electricity
- Formulas and Important Equations
- NEET Questions on Current Electricity
- Previous Year NEET Questions on Current Electricity
- Solved NEET Questions with Detailed Explanations
- Practice Questions for Current Electricity
- Common Mistakes to Avoid in Current Electricity
- FAQs about Current Electricity
Introduction to Current Electricity for NEET
Current Electricity is a essential topic inside the NEET Physics syllabus, covering standards inclusive of Ohm’s Law, resistivity, electric power, Kirchhoff’s legal guidelines, and extra. It performs a key role in expertise electric powered circuits, carrying out substances, and the go with the flow of charges, making it crucial for scoring nicely in the NEET exam. Questions from this topic are concept-based totally, regularly related to calculations related to electric powered modern-day, potential difference, resistance, and circuit evaluation. Mastering this topic calls for a clear know-how of theoretical ideas together with the ability to apply them to numerical troubles. Regular practice of NEET questions on Current Electricity facilitates in strengthening hassle-solving skills and enhancing speed and accuracy in the course of the exam.
Importance of the Topic in NEET Exam
Current Electricity is a pretty crucial subject matter in the NEET exam for numerous reasons:
- Conceptual Foundation: It offers the essential ideas and standards which are important for expertise in other topics in physics, such as electromagnetism and electronics.
- Direct Applications: Many actual-global devices and technologies, along with electric circuits, generators, and motors, depend upon the principles of Current Electricity.
- Numerical Problems: NEET often consists of numerical troubles primarily based on Current Electricity, checking out your understanding of the principles and your capability to apply them to remedy realistic troubles.
- Interrelation with Other Topics: Current Electricity is intently associated with different topics in physics, consisting of mechanics and thermodynamics, which assist you to set up connections and improve your standard expertise.
Download: Current Electricity
| Title | Download |
|---|---|
| Current Electricity NEET Questions with Answer | Click Here |
Key Concepts in Current Electricity
| Concept | Definition | Formula |
|---|---|---|
| Electric Current | The flow of drift of electric charge through a conductor. | I = Q/t |
| Ohm’s Law | The relationship among current, voltage, and resistance in a circuit. | V = IR |
| Resistance | The opposition to the flow of electrical current in a conductor. | R = V/I |
| Resistivity | The property of a material that opposes the flow of electric current. | ρ = RA/l |
| Conductance | The reciprocal of resistance. | G = 1/R |
| Conductivity | The reciprocal of resistivity. | σ = 1/ρ |
| Series Circuit | A circuit where components are connected one after another. | Req = R1 + R2 + … + Rn |
| Parallel Circuit | A circuit where components are connected side by side. | 1/Req = 1/R1 + 1/R2 + … + 1/Rn |
| Kirchhoff’s First Law (Junction Rule) | The sum of currents entering a junction is equal to the sum of currents leaving the junction. | ΣIin = ΣIout |
| Kirchhoff’s Second Law (Loop Rule) | The sum of the potential differences around any closed loop in a circuit is zero. | ΣV = 0 |
| Wheatstone Bridge | A circuit used to measure an unknown resistance by balancing known resistances. | R1/R2 = R3/R4 |
| Potentiometer | A device used to measure the emf of a cell or the potential difference between points in a circuit. | V = (l/L) * V0 |
Formulas and Important Equations
Current, Voltage, and Resistance Relations
Ohm’s Law: V = IR
- V: voltage (ability difference)
- I: current
- R: resistance
Resistance: R = V/I
Conductance: G = 1/R
Power in Electrical Circuits
Electrical power: P = VI
- P: energy
- V: voltage
- I: current
Alternate forms:
- P = I²R
- P = V²/R
Energy Consumption in Circuits
Electrical energy: E = Pt
- E: energy
- P: power
- t: time
Combination of Resistors
Series combination:
Equivalent resistance: Req = R1 + R2 + … + Rn
Parallel combination:
1/Req = 1/R1 + 1/R2 + … + 1/Rn
NEET Questions on Current Electricity
Multiple Choice Questions (MCQs)
| Question | Options |
|---|---|
| 1. The unit of electrical resistivity is: | (a) ohm (b) ohm-meter (c) ohm/meter (d) ohm/meter² |
| 2. According to Ohm’s regulation, the modern-day flowing thru a conductor is directly proportional to: | (a) resistance (b) voltage (c) temperature (d) length |
| 3. The equivalent resistance of resistors linked in series is: | (a) less than the smallest man or woman resistance (b) more than the largest character resistance (c) same to the common of the person resistances (d) equal to the fabricated from the individual resistances |
| 4. The heating effect of electric modern-day is utilized in: | (a) electric heater (b) electric bulb (c) electric iron (d) all of those |
| 5. The magnetic field round a current-sporting conductor is: | (a) radial (b) round (c) parallel (d) perpendicular |
Assertion and Reason Questions
| Assertion | Reason |
|---|---|
| The resistance of a conductor will increase with its duration. | The longer the conductor, the greater the variety of collisions between electrons and atoms. |
| The strength ate up in a circuit is most when the resistance of the circuit is identical to the internal resistance of the battery. | Maximum strength transfer occurs while the load resistance is identical to the supply resistance. |
| A potentiometer is a greater sensitive device than a voltmeter. | A potentiometer measures emf without drawing any present current from the supply. |
Numericals Based on Ohm’s Law
- A conductor of resistance 10 ohms is connected to a battery of emf 12 volts. Calculate the current flowing through the conductor.
- A bulb rated 100 W, 220 V is connected to a 220 V supply. Find the current drawn by the bulb and the resistance of its filament.
Current Division in Parallel Circuits
- A 6-ohm resistor and a 3-ohm resistor are connected in parallel to a 12-volt battery. Find the current flowing through each resistor.
Previous Year NEET Questions on Current Electricity
Topic-wise Breakdown
Electric Charge and Electric Field:
- Questions on Coulomb’s regulation, electric area depth, electric ability, and electric powered ability energy.
Electric Current and Ohm’s Law:
- Questions on Ohm’s law, resistance, resistivity, temperature dependence of resistance, and electric electricity.
Series and Parallel Combinations of Resistors:
- Questions on equal resistance, Kirchhoff’s legal guidelines, and modern division in parallel circuits.
Heating Effect of Electric Current:
- Questions on Joule’s law, electric powered strength, and packages of heating effect.
Magnetic Effects of Electric Current:
- Questions on Biot-Savart regulation, magnetic discipline because of a contemporary-sporting conductor, Ampere’s law, force on a moving fee in a magnetic subject, force on a current-carrying conductor in a magnetic subject, torque on a modern-day loop in a magnetic subject, magnetic dipole second, moving coil galvanometer, ammeter, and voltmeter.
Chemical Effects of Electric Current:
- Questions on electrolysis, Faraday’s laws of electrolysis, and electrochemical cells.
Solved NEET Questions with Detailed Explanations
Step-by-Step Solutions
| Question | Solution |
|---|---|
| 1. A wire of resistance 10 ohms is connected to a battery of emf 12 volts. Calculate the current flowing through the conductor. | Using Ohm’s law: V = IR, we can find the current: I = V/R = 12 V / 10 ohms = 1.2 A. |
| 2. A bulb rated 100 W, 220 V is connected to a 220 V supply. Find the current drawn by the bulb and the resistance of its filament. | Using the formula for power: P = VI, we can find the current: I = P/V = 100 W / 220 V = 0.45 A. Then, using Ohm’s law: R = V/I = 220 V / 0.45 A = 488.9 ohms. |
| 3. A 6-ohm resistor and a 3-ohm resistor are connected in parallel to a 12-volt battery. Find the current flowing through each resistor. | First, find the equivalent resistance: 1/Req = 1/6 + 1/3 = 1/2, so Req = 2 ohms. Then, using Ohm’s law: I = V/Req = 12 V / 2 ohms = 6 A. Now, to find the current through each resistor, use the current divider rule: I1 = (R2 / (R1 + R2)) * I = (3 / (6 + 3)) * 6 A = 2 A, and I2 = (R1 / (R1 + R2)) * I = (6 / (6 + 3)) * 6 A = 4 A. |
Tips for Solving Complex Problems
- Break down the trouble into smaller parts: If the hassle appears overwhelming, try to divide it into less complicated steps.
- Draw a diagram: A diagram can assist visualize the hassle and become aware of the applicable portions.
- Use the suitable formulas: Make positive you’re the usage of an appropriate formulas for the given situation.
- Check your units: Ensure that every one devices are consistent at some point of the calculation.
- Verify your answer: After solving the trouble, take a look at your answer to see if it makes sense.
- Practice frequently: The extra you exercise, the higher you will become at solving complex problems.
Practice Questions for Current Electricity
Concept-Based Questions
| Question | Difficulty Level |
|---|---|
| 1. Explain the difference between resistance and resistivity. | Medium |
| 2. Derive the formula for the equivalent resistance of resistors in series. | Medium |
| 3. State and explain Kirchhoff’s laws. | Medium |
| 4. Describe the principle of a potentiometer and its applications. | High |
| 5. Explain the concept of drift velocity and its relation to electric current. | High |
Advanced Level Questions
| Question | Difficulty Level |
|---|---|
| 1. A battery of emf 12 volts and internal resistance 2 ohms is connected to a 10-ohm resistor. Calculate the terminal voltage of the battery. | High |
| 2. A Wheatstone bridge is balanced when the ratio of the resistances in the four arms is 2:3:4:5. If the unknown resistance is 10 ohms, find the other three resistances. | High |
| 3. A solenoid of length 50 cm and radius 2 cm has 1000 turns. Calculate the magnetic field at the center of the solenoid when it carries a current of 2 A. | High |
| 4. A capacitor of capacitance 10 μF is charged to a potential difference of 100 volts. It is then connected to a resistor of 100 kΩ. Calculate the time constant of the circuit and the time taken for the capacitor to discharge to 50% of its initial charge. | High |
| 5. A moving coil galvanometer has a resistance of 50 ohms and a full-scale deflection current of 1 mA. Convert it into an ammeter to measure a maximum current of 1 A. | High |
Time-Bound Mock Questions
- Set 1: 20 questions, 40 minutes
- Set 2: 30 questions, 60 minutes
- Set 3: 40 questions, 80 minutes
Common Mistakes to Avoid in Current Electricity
Misinterpretation of Kirchhoff’s Laws
- Incorrect utility of the junction rule: Ensure that the sum of currents getting into a junction equals the sum of currents leaving it.
- Incorrect utility of the loop rule: Make positive that the sum of potential variations round any closed loop is 0.
- Neglecting the direction of currents and voltages: Always remember the route of currents and voltages while making use of Kirchhoff’s legal guidelines.
Calculation Errors in Complex Circuits
- Incorrectly combining resistors: Ensure that you are the usage of the proper formulation for combining resistors in series and parallel.
- Incorrectly calculating equal resistance: Double-check your calculations for equivalent resistance.
- Incorrectly applying Ohm’s law: Make positive you’re the usage of Ohm’s law efficaciously to find cutting-edge, voltage, or resistance.
- Arithmetic mistakes: Avoid simple arithmetic mistakes that may result in incorrect solutions.
Conceptual Errors in Series and Parallel Circuits
- Confusing collection and parallel connections: Make sure you apprehend the distinction among collection and parallel circuits and their homes.
- Incorrectly calculating equal resistance: Ensure you are using the right formulation for calculating equal resistance in series and parallel.
- Incorrectly applying the modern-day divider rule: Make positive you’re using the modern divider rule correctly to discover the cutting-edge via every department in a parallel circuit.
- Incorrectly applying the voltage divider rule: Make sure you are using the voltage divider rule effectively to discover the voltage throughout every resistor in a chain circuit.
FAQs about Current Electricity
Q. What sort of questions are requested from Current Electricity in NEET?
Ans: Questions commonly cover subjects like Ohm’s Law, Kirchhoff’s Laws, circuit evaluation, resistivity, strength dissipation, and electrical gadgets.
Q. How many questions are anticipated from Current Electricity in NEET?
Ans: Usually, 2-three questions are requested from Current Electricity, contributing round 8-12 marks.
Q. Is Current Electricity a scoring subject matter in NEET?
Ans: Yes, it is a conceptual and scoring subject matter, provided the ideas and formulae are well understood.
Q. How to successfully prepare for Current Electricity questions in NEET?
Ans: Practice fixing circuit issues, understand the application of legal guidelines, and frequently strive mock checks and previous yr’s papers.
Q. What are commonplace mistakes to keep away from in Current Electricity questions?
Ans: Misinterpreting circuit diagrams, neglecting unit conversions, and wrong application of Kirchhoff’s legal guidelines are not unusual mistakes.
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