NEET UG Modern Physics & Electronics: Nuclei – Chapter Test
NEET UG Modern Physics & Electronics: Nuclei – Chapter Test is an online chapter test in the NEET UG pattern, covering Modern Physics & Electronics. Attempt it on SeatBeat with a timer like the real exam, then see a detailed solution for every question and your score and weak-topic analysis.
Topics in this test
| Topic | Questions |
|---|---|
| Modern Physics & Electronics | 20 |
Difficulty: 7 medium · 13 hard
Nuclei MCQ questions with answers
The first 3 of 20 questions. Unlock the series for the rest, each with a solution.
Q1. In the empirical relation R = R₀A^(1/3) for the radius of a nucleus, the constant R₀ has the value approximately
किसी नाभिक की त्रिज्या के लिए आनुभविक संबंध R = R₀A^(1/3) में, नियतांक R₀ का मान लगभग होता है
- A. 1.2 nm
- B. 1.2 fm
- C. 1.2 Å
- D. 1.2 pm
Solution
R₀ ≈ 1.2 fm (1.2×10⁻¹⁵ m) is the standard value; the angstrom, nanometre and picometre are far too large (atomic rather than nuclear scale).
R₀ ≈ 1.2 fm (1.2×10⁻¹⁵ m) मानक मान है; एंग्स्ट्रॉम, नैनोमीटर और पिकोमीटर बहुत बड़े हैं (परमाणु पैमाना न कि नाभिकीय पैमाना)।
Q2. The decay constant of a radioactive nuclide is 1.5 × 10⁻⁹ s⁻¹. Its half-life is approximately
किसी रेडियोसक्रिय न्यूक्लाइड का क्षय नियतांक 1.5 × 10⁻⁹ s⁻¹ है। इसकी अर्ध-आयु लगभग है
- A. 3.00 × 10⁸ s
- B. 6.67 × 10⁸ s
- C. 1.50 × 10⁹ s
- D. 4.62 × 10⁸ s
Solution
T½ = 0.693/λ = 0.693 / (1.5 × 10⁻⁹) ≈ 4.62 × 10⁸ s. The value 6.67 × 10⁸ s is the mean life (1/λ), a common trap.
T½ = 0.693/λ = 0.693 / (1.5 × 10⁻⁹) ≈ 4.62 × 10⁸ s। मान 6.67 × 10⁸ s माध्य आयु (1/λ) है, जो एक सामान्य भ्रमजाल है।
Q3. The approximate energy released in the fission of a single ₉₂²³⁵U nucleus is
एकल ₉₂²³⁵U नाभिक के विखंडन में मुक्त होने वाली लगभग ऊर्जा है
- A. 200 MeV
- B. 17.6 MeV
- C. 28 MeV
- D. 1000 MeV
Solution
Each U-235 fission releases about 200 MeV, distributed mainly as kinetic energy of the fragments.
प्रत्येक U-235 विखंडन लगभग 200 MeV मुक्त करता है, जो मुख्यतः खंडों की गतिज ऊर्जा के रूप में वितरित होती है।
Frequently asked questions
How many questions are in the NEET UG Modern Physics & Electronics: Nuclei – Chapter Test?
20 questions for 20 marks, to be answered in 20 minutes.
Is there negative marking in the NEET UG Modern Physics & Electronics: Nuclei – Chapter Test?
Yes — 0.25 marks are deducted for each wrong answer, as in the real exam pattern.
Which topics does the NEET UG Modern Physics & Electronics: Nuclei – Chapter Test cover?
Modern Physics & Electronics (20 questions).
Is the NEET UG Modern Physics & Electronics: Nuclei – Chapter Test free?
It is part of the NEET UG 2027 Mock Test Series (134 tests, ₹299). You can first try Biology in Human Welfare – Topic Test for free.
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