Resistance R∝ l/A , and for the new wire, R′ = R/4.Heat H ∝ 1/R , so H′ = 4H. Answer: (d) 4H. Class 12th Science Physics NCERT MCQ Questions NCERT Books MCQ Questions Session 2024-2025.
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Given P = I² R₃, substituting values: 6 = (2.0)² R₃ ⟹ R₃ = 1.5Ω Voltage across R₃, V₃ = IR₃ = 2.0 ×1.5 = 3V. Answer: (c) 3V. Class 12th Science Physics NCERT MCQ Questions NCERT Books MCQ Questions ...
The wire is divided into two equal semicircles, each with resistance R. These are in parallel, so the effective resistance is: 1/Reff = 1/R + 1/R Thus, Reff = R/2. Answer: (b) R/2. Class 12th Science Physics NCERT MCQ Questions NCERT ...
Resistance is given by R = p L/A . Given La/Lb = 1/2 and da/db = 2/3, so Aa/Ab = 2/3 2 = 4/g. thus, Ra/Rb = (1/2)/(4g) = 9/8. Since V ∝ R in series, Va/Vb = Ra/Rb = ...
Cultural diversity shapes musical instruments, adapting them to regional traditions. Different materials, playing techniques and sounds reflect unique cultural identities, like the shehnai in North India and nadaswaram in South India. Class 6 NCERT Arts Chapter 7 Musical Instruments solutions Class 6 ...