Neco 2017 Physics Question 29

Practice objective / multiple choice question 29 from the 2017 Neco Physics examination.

Neco 2017 Physics Objective / Multiple Choice Medium Difficulty

Question 29 NECO • 2017 • PHYSICS • objective

A metal rod of length \(L_{0}=1.20\ \text{m}\) at \(20^{\circ}\text{C}\) is heated uniformly to \(80^{\circ}\text{C}\). It is to fit exactly into a slot that was \(S_{0}=1.22\ \text{m}\) long at \(20^{\circ}\text{C}\). The rod and the slot are made of different materials whose linear expansion coefficients satisfy \(\beta = \dfrac{\alpha}{2}\), where \(\alpha\) is the coefficient of the rod and \(\beta\) that of the slot. Determine the value of \(\alpha\) (in \(\text{°C}^{-1}\)) that will allow the rod to just fit the slot at \(80^{\circ}\text{C}\).

A. α ≈ 6.8×10⁻⁴ °C⁻¹

B. α ≈ 4.2×10⁻⁴ °C⁻¹

Correct Answer C. α ≈ 5.6×10⁻⁴ °C⁻¹

D. α ≈ 5.6×10⁻³ °C⁻¹

Correct Answer

Correct Option:

α ≈ 5.6×10⁻⁴ °C⁻¹

This is Neco 2017 Physics Question 29. It is one of the objective questions from the 2017 Neco Physics examination.

Difficulty level: Medium .

You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.

Unlock Full Access Available for Android & Windows

Chat with Support