Properties of Solids & Liquids-Young's Modulus [NEST (National Entrance Screening Test-NISER) Physics]: Questions 1 - 3 of 3
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Question 1
Appeared in Year: 2015
Question MCQ▾
A horizontal steel railroad track has a length of 100 m when the temperature is 250 C. The track is constrained from expanding or bending. The stress on the track on a hot summer day, when the temperature is 400 C, is –
(Note: the linear coefficient of thermal expansion for steel is and the Young՚s modulus of steel is )
Choices
Choice (4) | Response | |
---|---|---|
a. | ||
b. | ||
c. | ||
d. |
Question 2
Appeared in Year: 2016
Question MCQ▾
A monochromatic light source of wavelength is placed slightly above a plane mirror as shown. Image of in can be used as a virtual source to produce interference fringes on the screen. The distance of source from is , and the distance of screen from is (figure is not to scale) . If the angle radians, the width of the interference fringes observed on the screen is –
Choices
Choice (4) | Response | |
---|---|---|
a. | ||
b. | ||
c. | ||
d. |
Question 3
Appeared in Year: 2015
Question MCQ▾
The stress – strain plot for wires made of two materials ( and ) is presented schematically in the accompanying figure. The points and represent fracture points of the two materials and respectively. It can be concluded from these graphs that –
Choices
Choice (4) | Response | |
---|---|---|
a. | Material and are equally brittle | |
b. | The linear region of material extends to a larger value of stress that of material . | |
c. | Material is more ductile than material | |
d. | Material has Young՚s modulus larger than that of material |