JEE Main Oscillations and Waves – Topic Test
JEE Main Oscillations and Waves – Topic Test is an online topic test in the JEE Main pattern, covering Oscillations and Waves. 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 |
|---|---|
| Oscillations and Waves | 30 |
Difficulty: 13 medium · 17 hard
Oscillations and Waves MCQ questions with answers
The first 3 of 30 questions. Unlock the series for the rest, each with a solution.
Q1. For small oscillations of a simple pendulum, which one of the following does NOT affect its time period?
एक सरल लोलक के छोटे दोलनों के लिए, निम्नलिखित में से कौन-सा एक उसके आवर्तकाल को प्रभावित नहीं करता?
- A. The length of the pendulum / लोलक की लंबाई
- B. The local acceleration due to gravity / स्थानीय गुरुत्वीय त्वरण
- C. The mass of the bob / गोलक का द्रव्यमान
- D. The effective gravity in an accelerating frame / त्वरित निर्देश-तंत्र में प्रभावी गुरुत्व
Solution
The period is T = 2π√(L/g), depending only on the length and the local acceleration due to gravity. It is independent of the mass of the bob (and, for small angles, of the amplitude).
आवर्तकाल T = 2π√(L/g) होता है, जो केवल लंबाई तथा स्थानीय गुरुत्वीय त्वरण पर निर्भर करता है। यह गोलक के द्रव्यमान से स्वतंत्र होता है (तथा छोटे कोणों के लिए, आयाम से भी)।
Q2. Two tuning forks of frequencies 256 Hz and 260 Hz are sounded together. The number of beats heard per second is:
256 Hz तथा 260 Hz आवृत्तियों के दो स्वरित्र द्विभुज एक साथ बजाए जाते हैं। प्रति सेकंड सुनी गई विस्पंदों की संख्या है:
- A. 516
- B. 4
- C. 8
- D. 2
Solution
The beat frequency equals the difference of the two frequencies, |260 − 256| = 4 beats per second.
विस्पंद आवृत्ति दोनों आवृत्तियों के अंतर के बराबर होती है, |260 − 256| = 4 विस्पंद प्रति सेकंड।
Q3. A particle executing simple harmonic motion has amplitude 5 cm. At a certain instant, its speed is exactly half of its maximum speed. The magnitude of its displacement from the mean position at that instant is:
सरल आवर्त गति करने वाले एक कण का आयाम 5 cm है। किसी निश्चित क्षण पर, उसकी चाल उसकी अधिकतम चाल की ठीक आधी है। उस क्षण माध्य स्थिति से उसके विस्थापन का परिमाण है:
- A. 5/√2 cm
- B. 5/√3 cm
- C. 2.5 cm
- D. (5√3)/2 cm
Solution
Using v = ω√(A² − x²) and v_max = ωA, setting v = v_max/2 gives A² − x² = A²/4, so x = (√3/2)A = (5√3)/2 cm. The other values correspond to common errors such as assuming x equals half the amplitude.
v = ω√(A² − x²) और v_max = ωA का उपयोग करते हुए, v = v_max/2 रखने पर A² − x² = A²/4 प्राप्त होता है, अतः x = (√3/2)A = (5√3)/2 cm। अन्य मान सामान्य त्रुटियों से मेल खाते हैं जैसे x को आयाम का आधा मान लेना।
Frequently asked questions
How many questions are in the JEE Main Oscillations and Waves – Topic Test?
30 questions for 30 marks, to be answered in 30 minutes.
Is there negative marking in the JEE Main Oscillations and Waves – Topic Test?
Yes — 0.25 marks are deducted for each wrong answer, as in the real exam pattern.
Which topics does the JEE Main Oscillations and Waves – Topic Test cover?
Oscillations and Waves (30 questions).
Is the JEE Main Oscillations and Waves – Topic Test free?
It is part of the JEE Main 2027 Mock Test Series (104 tests, ₹299). You can first try Basic Concepts & Atomic Structure – Topic Test for free.
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