| ⇦ | 
| ⇨ |
The following four wires are made of the same material. Which of these will have the largest extension when the same tension is applied?
Options
(a) length = 100 cm, diameter = 1 mm
(b) length = 200 cm, diameter = 2 mm
(c) length = 300 cm, diameter = 3 mm
(d) length = 50 cm, diameter = 0.5 mm
Correct Answer:
length = 50 cm, diameter = 0.5 mm
Explanation:
F = YA / L x l
So, extension l ∞ L / A ∞ L / D² [F and Y are constant]
l₁ ∞ 100 / 1² ∞ 100 l₂ ∞ 200 / 2² ∞ 50
l₃ ∞ 300 / 3² ∞ 100 / 3 l₄ ∞ 50 / 1 / 4 ∞ 200
The ratio of L / D² is maximum for case (d).
Related Questions: - A coil of N turns and mean cross-sectional area A is rotating with uniform angular
- A long solenoid has 500 turns. When a current of 2 ampere is passed through it
- A particle in simple harmonic motion is described by the displacement function
- Radioactivity of a sample at T₁ time is R₁ and at time T₂ is R₂. If half-life
- A U²³⁵ reactor generates power at a rate of P producing 2×10⁸ fission per second.
Topics: Properties of Bulk Matter
(130)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A coil of N turns and mean cross-sectional area A is rotating with uniform angular
- A long solenoid has 500 turns. When a current of 2 ampere is passed through it
- A particle in simple harmonic motion is described by the displacement function
- Radioactivity of a sample at T₁ time is R₁ and at time T₂ is R₂. If half-life
- A U²³⁵ reactor generates power at a rate of P producing 2×10⁸ fission per second.
Topics: Properties of Bulk Matter (130)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
18000+ students are using NEETLab to improve their score. What about you?
Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.
Share this page with your friends
Leave a Reply