Student Login

Home›Chapters›Thermometry, Thermal Expansion and Calorimetry PYQs›Thermometry & Thermal Expansion›Question 56

JEE Main 2020 (2 Sep, Shift 2) · Thermometry & Thermal Expansion

Thermometry & Thermal Expansion question from JEE Main 2020 (2 Sep, Shift 2)

Q56JEE Main 2020 · 2 SEP · SHIFT 2Medium

Thermometry & Thermal Expansion

When the temperature of a metal wire is increased from 0oC to 10oC, its length increases by 0.02%. The percentage change in its mass density will be closest to:

Show answer and solution

Answer: (b)

Linear strain $= 0.02\%$ , so volume increases by $3 \times 0.02 = 0.06\%$ .
Mass is constant, so $\rho \propto 1/V$ : density falls by about $0.06\%$ .
So the answer is (b) 0.06.

Report a mistake

More questions on Thermometry & Thermal Expansion

A bakelite beaker has volume capacity of 500 cc at 30oC. When it is partially filled with…JEE Main 2020 (3 Sep, Shift 1)
A thermometer graduated according to a linear scale reads a value x0 when in contact with…JEE Main 2019 (11 Jan, Shift 2)
A copper rod of 88 cm and an aluminium rod of unknown length have their increase in…NEET 2019
Two rods A and B of identical dimensions are at temperature 30°C. If A is heated upto…JEE Main 2019 (11 Jan, Shift 2)
A rod, of length L at room temperature and uniform area of cross section A, is made of a…JEE Main 2019 (9 Jan, Shift 1)
A clock pendulum having coefficient of linear expansion. α = 9 × 10⁻⁷/°C⁻¹ has a period…MHT CET 2019 (2 May, Shift 1)
At 40o C, a brass wire of 1 mm radius is hung from the ceiling. A small mass, M is hung…JEE Main 2019 (12 Apr, Shift 1)
A steel rail of length 5 m and area of cross section 40cm2 is prevented from expanding…JEE Main 2017 (9 Apr, Shift 1)