| ⇦ | 
| ⇨ |
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 speeding motorcyclist sees traffic jam ahead him. He slows down to 36 km per hour
- A transistor is working in common emitter mode. Its amplification factor is 80
- A battery charges a parallel plate capacitor seperated by distance(d) so that the energy
- A transformer of 100% efficiency has 200 turns in the primary coil and 40000 turns
- A disc of moment of inertia (9.8/π²) kg m² is rotating at 600 rpm. If the frequency
Topics: Properties of Bulk Matter
(130)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A speeding motorcyclist sees traffic jam ahead him. He slows down to 36 km per hour
- A transistor is working in common emitter mode. Its amplification factor is 80
- A battery charges a parallel plate capacitor seperated by distance(d) so that the energy
- A transformer of 100% efficiency has 200 turns in the primary coil and 40000 turns
- A disc of moment of inertia (9.8/π²) kg m² is rotating at 600 rpm. If the frequency
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