NEET UG Modern Physics & Electronics – Topic Test
NEET UG Modern Physics & Electronics – Topic Test is an online topic 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 | 30 |
Difficulty: 15 medium · 15 hard
Modern Physics & Electronics MCQ questions with answers
The first 3 of 30 questions. Unlock the series for the rest, each with a solution.
Q1. The linear momentum of a photon of wavelength 500 nm is approximately (take h = 6.63 × 10⁻³⁴ J·s):
500 nm तरंगदैर्घ्य वाले एक फोटॉन का रैखिक संवेग लगभग है (h = 6.63 × 10⁻³⁴ J·s लीजिए):
- A. 1.33 × 10⁻²⁷ kg·m/s
- B. 1.33 × 10⁻²⁹ kg·m/s
- C. 6.63 × 10⁻²⁷ kg·m/s
- D. 3.98 × 10⁻²⁶ kg·m/s
Solution
p = h/λ = (6.63 × 10⁻³⁴)/(500 × 10⁻⁹) ≈ 1.33 × 10⁻²⁷ kg·m/s.
p = h/λ = (6.63 × 10⁻³⁴)/(500 × 10⁻⁹) ≈ 1.33 × 10⁻²⁷ kg·m/s।
Q2. Match List I with List II: List I: A. Work function; B. Maximum kinetic energy of a photoelectron; C. de Broglie wavelength; D. Threshold frequency. List II: 1. hν − φ₀; 2. h/mv; 3. φ₀/h; 4. hν₀. Select the correct matching.
सूची I का सूची II से मिलान कीजिए: सूची I: A. कार्य-फलन; B. प्रकाश-इलेक्ट्रॉन की अधिकतम गतिज ऊर्जा; C. दे ब्रॉग्ली तरंगदैर्घ्य; D. देहली आवृत्ति। सूची II: 1. hν − φ₀; 2. h/mv; 3. φ₀/h; 4. hν₀। सही मिलान चुनिए।
- A. A-4, B-1, C-2, D-3
- B. A-4, B-1, C-3, D-2
- C. A-1, B-4, C-2, D-3
- D. A-3, B-1, C-2, D-4
Solution
Work function = hν₀ (A-4); maximum kinetic energy = hν − φ₀ (B-1); de Broglie wavelength = h/mv (C-2); threshold frequency = φ₀/h (D-3).
कार्य-फलन = hν₀ (A-4); अधिकतम गतिज ऊर्जा = hν − φ₀ (B-1); दे ब्रॉग्ली तरंगदैर्घ्य = h/mv (C-2); देहली आवृत्ति = φ₀/h (D-3)।
Q3. In the standard circuit symbol of a p-n junction diode, the arrowhead (which also indicates the direction of conventional current in forward bias) points from:
एक p-n संधि डायोड के मानक परिपथ प्रतीक में, तीर का सिरा (जो अग्र बायस में पारंपरिक धारा की दिशा को भी इंगित करता है) किससे की ओर इंगित करता है:
- A. the n-region to the external metal contact / n-क्षेत्र से बाह्य धातु संपर्क की ओर
- B. the p-region to the n-region / p-क्षेत्र से n-क्षेत्र की ओर
- C. the cathode to the anode / कैथोड से एनोड की ओर
- D. the n-region to the p-region / n-क्षेत्र से p-क्षेत्र की ओर
Solution
The arrowhead of the diode symbol represents the p-side (anode) and points toward the n-side (cathode), the direction in which conventional current flows under forward bias.
डायोड प्रतीक का तीर का सिरा p-पक्ष (एनोड) को निरूपित करता है और n-पक्ष (कैथोड) की ओर इंगित करता है, वही दिशा जिसमें अग्र बायस के अंतर्गत पारंपरिक धारा प्रवाहित होती है।
Frequently asked questions
How many questions are in the NEET UG Modern Physics & Electronics – Topic Test?
30 questions for 30 marks, to be answered in 30 minutes.
Is there negative marking in the NEET UG Modern Physics & Electronics – Topic 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 – Topic Test cover?
Modern Physics & Electronics (30 questions).
Is the NEET UG Modern Physics & Electronics – Topic 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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