Class 10 Science Chapter 11 | Electricity (Vidyut) | Top 50 MCQ & Numericals | Board Exam 2026

Prepare for your Class 10 Science Board Exam 2026 with this comprehensive revision of Chapter 11: Electricity (Vidyut). This live session covers the Top 50 Multiple Choice Questions (MCQs) and Numericals, focusing on the fundamental concepts of electric current, potential difference, resistance, and heating effects of electric current. We discuss key formulas, SI units, and solve important numerical problems that are frequently asked in board exams. Key Topics Covered: Electric Current and its SI unit (Ampere) Electric Potential and Potential Difference (Volt) Ohm's Law (V = IR) and Resistance (Ohm) Factors affecting Resistance: Length, Area, Material, Temperature Resistivity and its SI unit (Ohm-meter) Combination of Resistors: Series and Parallel Heating Effect of Electric Current: Joule's Law Electric Power (Watt) and Electrical Energy (Kilowatt-hour) Domestic Electric Circuits: Fuse, Earthing, Parallel connection advantages Formulas Discussed: Ohm's Law: V = IR Resistance in Series: Rₛ = R₁ + R₂ + R₃ Resistance in Parallel: 1/Rₚ = 1/R₁ + 1/R₂ + 1/R₃ Electric Power: P = VI = I²R = V²/R Heat Energy: H = I²Rt Resistivity: ρ = RA/l Make sure to watch the full video to clear your doubts, practice numericals, and strengthen your physics concepts. Timestamps: 00:00:00 Introduction & Chapter Overview 00:00:54 Q1: SI Unit of Electric Charge (Coulomb) & Current (Ampere) 00:03:30 Q2: Rate of flow of electric charge is called? (Electric Current) 00:05:50 Q3: Charge on one electron (1.6 × 10⁻¹⁹ C) 00:06:40 Q4: Instrument used to measure Electric Current (Ammeter) 00:07:38 Q5: How is Ammeter connected in a circuit? (Series) 00:08:26 Q6: Direction of Electric Current (Opposite to electron flow) 00:09:30 Q7: SI Unit of Electric Potential and Potential Difference (Volt) 00:10:46 Q8: Instrument used to measure Potential Difference (Voltmeter) 00:11:28 Q9: How is Voltmeter connected in a circuit? (Parallel) 00:14:03 Q10: 1 Volt is equal to? (1 Joule/Coulomb) 00:16:05 Q11: Ohm's Law relation (V ∝ I) 00:17:25 Q12: V is proportional to I if what remains constant? (Temperature) 00:18:19 Q13: SI Unit of Resistance (Ohm) 00:19:13 Q14: Value of 1 Ohm (1 Volt/Ampere) 00:19:59 Q15: Factor on which resistance does NOT depend (Color of conductor) 00:21:02 Q16: If length of wire is doubled, resistance becomes? (Doubled) 00:23:03 Q17: If area of cross-section is increased, resistance? (Decreases) 00:23:45 Q18: SI Unit of Electrical Resistivity (Ohm-meter) 00:25:49 Q19: Resistivity of metals and alloys (Very low) 00:27:23 Q20: Effect of temperature increase on resistance of metals (Increases) 00:28:18 Q21: Best conductor of electricity (Silver) 00:29:56 Q22: What remains constant in Series combination? (Current) 00:31:27 Q23: What remains constant in Parallel combination? (Potential Difference) 00:32:18 Q24: Formula for equivalent resistance in Series (Rs = R1 + R2 + R3) 00:33:26 Q25: Formula for equivalent resistance in Parallel (1/Rp = 1/R1 + 1/R2) 00:34:23 Q26: Domestic appliances are connected in which combination? (Parallel) 00:35:20 Q27: Equivalent resistance in Parallel is always? (Less than the smallest resistance) 00:36:03 Q28: Formula for Heating Effect of Electric Current (H = VIt, I²Rt, V²t/R) 00:37:35 Q29: Joule's Law of Heating relates to? (H ∝ I², R, t) 00:39:01 Q30: Filament of electric bulb is made of? (Tungsten) 00:41:11 Q31: Why is Tungsten used for filaments? (High melting point) 00:42:06 Q32: Gas filled in electric bulbs (Nitrogen or Argon) 00:42:57 Q33: Heating element of heater/iron is made of? (Nichrome) 00:44:23 Q34: Why alloys are used in heating devices? (High resistivity, do not oxidize easily) 00:47:06 Q35: Device used for safety in electric circuits (Fuse) 00:48:28 Q36: Fuse wire is connected in which wire? (Live wire/Series) 00:49:56 Q37: Properties of a good fuse wire (Low melting point, high resistance) 00:51:45 Q38: Formula for Electric Power (P = VI, I²R, V²/R) 00:54:30 Q39: SI Unit of Electric Power (Watt) 00:55:32 Q40: 1 Kilowatt is equal to? (1000 Watts) 00:57:00 Q41: Commercial unit of electrical energy (Kilowatt-hour / Unit) 00:58:22 Q42: 1 kWh is equal to how many Joules? (3.6 × 10⁶ J) 00:59:17 Q43: Power in a circuit with 1A current and 1V potential difference (1 Watt) 01:01:02 Q44: Numerical: Resistance change if radius is halved (4 times) 01:04:01 Q45: Which bulb has higher resistance: 100W or 40W? (40W) 01:06:43 Q46: Function of Rheostat (To change resistance/control current) 01:10:30 Q47: Heat (H) is proportional to current (I) as? (Square of current - I²) 01:11:32 Q48: Current value during Short Circuit (Increases heavily) 01:13:07 Q49: Value of 1 milliampere and 1 microampere (10⁻³ A, 10⁻⁶ A) 01:14:06 Q50: Why Copper and Aluminum are used for transmission? (Low resistivity) 01:15:52 Conclusion & Future Class Schedule #Class10Science #Electricity #PhysicsMCQ #BoardExam2026 #Class10Revision #PraveenJoshiClasses