Alternating Current — Top 20 Questions 20Questions0Correct0AttemptedQ1Step-down transformer: input 2.3 kV, primary current 5 A, efficiency 90%, output 230 V.

Magnetic Effects of Current — Top 20 Questions 20Questions0Correct0AttemptedQ1Ratio of B at centre of circular coil radius (r) to B

Current Electricity — Top 20 Questions 20Questions0Correct0AttemptedQ1Mobile battery: 4.2 V, 5800 mAh. Energy stored (kJ):A87.7 kJB43.8 kJC48.7 kJD24.4 kJ✅ Correct:

Electrostatics — Top 20 Questions 20Questions0Correct0AttemptedQ1Electric potential due to point charge (5times10^{-9}) C is 50 V. Distance from charge:A9 cmB90

Oscillations & Waves — Top 20 Questions 20Questions0Correct0AttemptedQ1Sonometer wire resonating length 90 cm at 400 Hz. Length for 600 Hz

Kinetic Theory of Gases — Top 20 Questions 20Questions0Correct0AttemptedQ10.056 kg of N₂ at 127°C. Heat required to double molecular speed

Thermodynamics — Top 20 Questions 20Questions0Correct0AttemptedQ1During an adiabatic process pressure (propto T^3). Ratio (C_p/C_v):A5/3B3/2C7/5D9/7✅ Correct: BAdiabatic: (PT^{-gamma/(gamma-1)} = text{const}). Given

Properties of Solids & Liquids — Top 20 Questions 20Questions0Correct0Attempted Q1Young’s modulus of wires A and B in ratio (1:4),

Gravitation — Top 20 Questions 20Questions0Correct0Attempted Q1 A wire of uniform mass density (mass (M), length (L)) is bent into

Work, Energy & Power — Top 20 Questions 20Questions 0Correct 0Attempted Q1 Percentage loss in kinetic energy when speed reduces