Mixed Practice – Numerical Problems (Thermodynamics & Waves)
Physics · Grade 11 · Week 51 · 25 questions
Mixed Practice is a foundational Grade 11 physics chapter that covers Numerical Problems (Thermodynamics & Waves). Mastering these ideas sharpens your problem-solving for numericals and conceptual questions alike.
What you'll practise
- Analyse Numerical Problems (Thermodynamics & Waves)
- Work through NCERT intext examples and exercise questions for mixed practice
- Apply mixed practice concepts to NCERT exercise and exemplar problems
All 25 questions in this Mixed Practice – Numerical Problems (Thermodynamics & Waves) quiz
Grade 11 Physics — Mixed Practice – Numerical Problems (Thermodynamics & Waves): 25 practice questions with instant scoring and explanations.
- A rod of length 1 m heated from 20 to 120°C, α = 10⁻⁵ /K. ΔL = :
- Heat to raise 2 kg water from 20 to 70°C (c=4186 J/kg·K):
- Heat to melt 1 kg ice at 0°C (L_f = 334 kJ/kg):
- Carnot engine T_hot=500 K, T_cold=300 K. Efficiency:
- Carnot engine with η=50%, T_cold=300 K. T_hot:
- Ideal gas PV=nRT. 1 mol at 300 K, P=10⁵ Pa. V:
- Isothermal compression halves V. Work done on gas (nRT ln2):
- Monatomic ideal gas, n=1 mol at 300 K. U = (3/2)RT:
- Cp of monatomic ideal = (5/2)R ≈ :
- Entropy change when 1 kg ice melts at 0°C (L=334 kJ/kg, T=273 K):
- Sound in air at 27°C, γ=1.4, M=28.8 g/mol. v ≈ :
- String L=1 m, tension 100 N, μ=0.01 kg/m. Fundamental:
- Open pipe length 0.5 m, v_sound=340 m/s. Fundamental:
- Closed pipe 0.5 m, v=340. Fundamental:
- Two forks 256 Hz and 260 Hz. Beats/s:
- Source 500 Hz moving 34 m/s toward stationary observer, v=340. f'=:
- Source stationary, observer moves 34 m/s toward it. Heard f (source=500, v=340):
- A wave y = 2 sin(4πx - 400πt). Wavelength:
- Same wave: frequency:
- Same wave: speed:
- SHM amplitude 5 cm, f=2 Hz. v_max:
- Spring k=100 N/m, mass 1 kg. T:
- Seconds pendulum length on Earth (g=9.8):
- Intensity quadrupled → sound level increases by:
- Wien's law: λ_max for T=1000 K (b=2.9×10⁻³ m·K):
Question 1 of 250 correct so far