NEET UG Laws of Motion & Work-Energy: Work, Energy and Power – Chapter Test
NEET UG Laws of Motion & Work-Energy: Work, Energy and Power – Chapter Test is an online chapter test in the NEET UG pattern, covering Laws of Motion & Work-Energy. 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 |
|---|---|
| Laws of Motion & Work-Energy | 20 |
Difficulty: 9 medium · 11 hard
Work, Energy and Power MCQ questions with answers
The first 3 of 20 questions. Unlock the series for the rest, each with a solution.
Q1. A constant force F = (3î + 4ĵ) N acts on a particle that undergoes a displacement s = (4î − 3ĵ) m. The work done by the force is:
एक नियत बल F = (3î + 4ĵ) N एक कण पर कार्य करता है जो विस्थापन s = (4î − 3ĵ) मी से गुजरता है। बल द्वारा किया गया कार्य है:
- A. 7 J
- B. 24 J
- C. 0 J
- D. 12 J
Solution
W = F·s = (3)(4) + (4)(−3) = 12 − 12 = 0 J; the force is perpendicular to the displacement.
W = F·s = (3)(4) + (4)(−3) = 12 − 12 = 0 J; बल विस्थापन के लंबवत है।
Q2. A motor lifts 100 kg of water through a vertical height of 20 m in 10 s at a steady rate (take g = 10 m/s²). The minimum power of the motor is:
एक मोटर 100 किग्रा जल को 20 मी ऊर्ध्वाधर ऊँचाई तक 10 से में एकसमान दर से उठाती है (g = 10 मी/से² लें)। मोटर की न्यूनतम शक्ति है:
- A. 20000 W
- B. 2000 W
- C. 200 W
- D. 1000 W
Solution
Power = work/time = mgh/t = (100·10·20)/10 = 2000 W.
शक्ति = कार्य/समय = mgh/t = (100·10·20)/10 = 2000 W।
Q3. Consider the following statements about conservative forces: 1. The work done by a conservative force over any closed path is zero. 2. The work done by a conservative force depends only on the initial and final positions. 3. Friction is a conservative force. Which of these statements is/are correct?
संरक्षी बलों के बारे में निम्नलिखित कथनों पर विचार करें: 1. किसी बंद पथ पर संरक्षी बल द्वारा किया गया कार्य शून्य होता है। 2. संरक्षी बल द्वारा किया गया कार्य केवल प्रारंभिक और अंतिम स्थितियों पर निर्भर करता है। 3. घर्षण एक संरक्षी बल है। इनमें से कौन-सा/से कथन सही है/हैं?
- A. 1 and 2 only / केवल 1 और 2
- B. 1, 2 and 3 / 1, 2 और 3
- C. 1 and 3 only / केवल 1 और 3
- D. 2 and 3 only / केवल 2 और 3
Solution
Statements 1 and 2 are defining properties of conservative forces; friction is a non-conservative (dissipative) force, so statement 3 is wrong.
कथन 1 और 2 संरक्षी बलों के परिभाषित गुण हैं; घर्षण एक असंरक्षी (अपव्ययी) बल है, अतः कथन 3 गलत है।
Frequently asked questions
How many questions are in the NEET UG Laws of Motion & Work-Energy: Work, Energy and Power – Chapter Test?
20 questions for 20 marks, to be answered in 20 minutes.
Is there negative marking in the NEET UG Laws of Motion & Work-Energy: Work, Energy and Power – Chapter Test?
Yes — 0.25 marks are deducted for each wrong answer, as in the real exam pattern.
Which topics does the NEET UG Laws of Motion & Work-Energy: Work, Energy and Power – Chapter Test cover?
Laws of Motion & Work-Energy (20 questions).
Is the NEET UG Laws of Motion & Work-Energy: Work, Energy and Power – 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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