| ⇦ | 
| ⇨ |
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 small part of the rim of a fly wheel breaks off while it is rotating at a constant
- Function of a rectifier is
- An A.C source is rated at 220 V, 50 Hz. The time taken for voltage to change
- An object is 8 cm high. It is desired to form a real image 4 cm high at 60 cm from
- The mean distance between the atoms of iron is 3 x 10⁻¹⁰ m and interatomic force
Topics: Properties of Bulk Matter
(130)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A small part of the rim of a fly wheel breaks off while it is rotating at a constant
- Function of a rectifier is
- An A.C source is rated at 220 V, 50 Hz. The time taken for voltage to change
- An object is 8 cm high. It is desired to form a real image 4 cm high at 60 cm from
- The mean distance between the atoms of iron is 3 x 10⁻¹⁰ m and interatomic force
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