alleryTwo resistors 3 Ω and 6 Ω in parallel. Equivalent resistance:
- 9 Ω
- 1.5 Ω
- 2 Ω (R_eq = R₁R₂/(R₁+R₂) = 18/9 = 2)
- 4.5 Ω
Show answer and solution
Correct answer: C. 2 Ω (R_eq = R₁R₂/(R₁+R₂) = 18/9 = 2)
Parallel: 1/R_eq = 1/3 + 1/6 = 3/6 = 1/2. R_eq = 2 Ω.
JEE Advanced Unit 2B: Friction, Gravitational and Normal Forces — practice questions
Explore 57 free Unit 2B: Friction, Gravitational and Normal Forces questions in JEE Advanced Physics. Open each question or exercise to read its content, reference answers and available explanation.
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Two resistors 3 Ω and 6 Ω in parallel. Equivalent resistance:Read the answer and worked solution →Specific heat capacity of monatomic ideal gas at constant V:Read the answer and worked solution →Electric field due to infinite plane sheet with surface charge density σ:Read the answer and worked solution →Sound wave intensity I dB scale. 60 dB to 80 dB ratio of intensity:Read the answer and worked solution →As per your syllabus, Table 1.1, the SI system has how many BASE quantities and units?Read the answer and worked solution →As per your syllabus, the SI unit of LUMINOUS INTENSITY is which?Read the answer and worked solution →As per your syllabus, the SI unit of AMOUNT OF SUBSTANCE is the mole, and one mole contains exactly how many entities?Read the answer and worked solution →As per your syllabus, the second is defined via the caesium-133 hyperfine transition frequency Δν_Cs, fixed at which value?Read the answer and worked solution →As per your syllabus, the metre is defined so that the speed of light in vacuum equals which value?Read the answer and worked solution →As per your syllabus, the kilogram is now defined via which fundamental constant?Read the answer and worked solution →As per your syllabus, the kelvin is defined by fixing which constant?Read the answer and worked solution →As per your syllabus, the unit of PLANE ANGLE in SI is which?Read the answer and worked solution →As per your syllabus, the unit of SOLID ANGLE in SI is which?Read the answer and worked solution →As per your syllabus, the SI unit of ELECTRIC CURRENT is the ampere, defined via the elementary charge fixed at which value?Read the answer and worked solution →As per your syllabus, 1 LITRE equals which SI volume?Read the answer and worked solution →As per your syllabus, 1 STANDARD ATMOSPHERIC PRESSURE (atm) equals approximately which value?Read the answer and worked solution →As per your syllabus, rule, ALL non-zero digits in a measurement are which?Read the answer and worked solution →As per your syllabus, the number of significant figures in 2.308 cm is which?Read the answer and worked solution →As per your syllabus, rule, in a number less than 1, the zeros LEFT of the first non-zero digit are which?Read the answer and worked solution →As per your syllabus, the number of significant figures in 0.007 m² is which?Read the answer and worked solution →As per your syllabus, in a number WITH a decimal point, TRAILING zeros are which?Read the answer and worked solution →As per your syllabus, the number of significant figures in 6.320 J is which?Read the answer and worked solution →As per your syllabus, the number 4 700 m written WITHOUT a decimal has how many significant figures?Read the answer and worked solution →As per your syllabus, in the form a × 10ᵇ all zeros appearing in the base number a are which?Read the answer and worked solution →As per your syllabus, the diameter of Earth ≈ 1.28 × 10⁷ m has order of magnitude equal to which value?Read the answer and worked solution →As per your syllabus, the diameter of a hydrogen atom (≈ 1.06 × 10⁻¹⁰ m) has order of magnitude equal to which value?Read the answer and worked solution →As per your syllabus, rule, exact integers (like 2 in s = 2πr or n in T = t/n) have how many significant figures?Read the answer and worked solution →As per your syllabus, the digit 0 conventionally placed to the LEFT of the decimal in numbers < 1 (e.g. 0.1250) is which?Read the answer and worked solution →As per your syllabus, Ex 1.2, 5.74 g of substance in 1.2 cm³ gives a density of which value to correct significant figures?Read the answer and worked solution →As per your syllabus, the sum 436.32 g + 227.2 g + 0.301 g = 663.821 g should be reported as which value?Read the answer and worked solution →
Worked practice questions
Specific heat capacity of monatomic ideal gas at constant V:
- (5/2)R
- R
- 2R
- (3/2)R
Show answer and solution
Correct answer: D. (3/2)R
Monatomic: f = 3 DOF, C_v = (f/2)R = (3/2)R. C_p = (5/2)R. γ = 5/3.
Electric field due to infinite plane sheet with surface charge density σ:
- σ/(2ε₀) (uniform on both sides)
- σ/ε₀
- σ/r²
- σ × ε₀
Show answer and solution
Correct answer: A. σ/(2ε₀) (uniform on both sides)
**By Gauss law on cylindrical pillbox:** E = σ/(2ε₀) on each side.
Field independent of distance.
**For conductor surface:** E = σ/ε₀ outside, 0 inside.
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