Minimum and maximum values of Poisson’s ratio for a metal lies between
Minimum and maximum values of Poisson’s ratio for a metal lies between
Options
(a) (-∞ to +∞) (b) 0 to 1 (c) (-∞ to 1) (d) 0 to 0.5
Correct Answer:
0 to […]
Properties of Bulk Matter
The respective speeds of the molecules are 1,2,3,4 and 5 km/s.
The respective speeds of the molecules are 1,2,3,4 and 5 km/s. The ratio of their r.m.s. velocity and the average velocity will be
Options
(a) √11:3 (b) 3:√11 (c) (1:2) (d) (3:4)
Correct […]
A body undergoes no change in volume. Poisson’s ratio is
A body undergoes no change in volume. Poisson’s ratio is
Options
(a) 0.5 (b) 0.05 (c) 0.25 (d) 2.5
Correct Answer:
0.5
Explanation:
No explanation available. Be the first to write the explanation […]
Wires A and B are made from the same material. A has twice the diameter and three times
Wires A and B are made from the same material. A has twice the diameter and three times the length of B. If the elastic limits are not reached, when each is stretched by the […]
Which of the following will be σ if Y=2.4 η?
Which of the following will be σ if Y=2.4 η?
Options
(a) (-1) (b) 0.2 (c) 0.1 (d) (-0.25)
Correct Answer:
0.2
Explanation:
No explanation available. Be the first to write the explanation […]
Eight drops of a liquid of density ρ and each of radius a are falling through air
Eight drops of a liquid of density ρ and each of radius a are falling through air with a constant velocity 3.75 cms⁻¹. When the eight drops coalesce to from a single drop the terminal […]
Perfectly black body radiates the energy 18 J/s at 300K. Another ordinary body of e=0.8
Perfectly black body radiates the energy 18 J/s at 300K. Another ordinary body of e=0.8 having same are at 500K will radiate
Options
(a) 111 J/s (b) 421 J/s (c) 321 J/s (d) […]
A black body is at 727⁰C. It emits energy at a rate which is proportional to
A black body is at 727⁰C. It emits energy at a rate which is proportional to
Options
(a) (1000)⁴ (b) (1000)² (c) (727)⁴ (d) (727)²
Correct Answer:
(1000)⁴
Explanation:
According to Stefan’s law, E […]
A student performs an experiment to determine the Young’s modulus of a wire
A student performs an experiment to determine the Young’s modulus of a wire, exactly 2 m long, by Searle’s method. In a particular reading, the student measures the extension in the length of the wire […]
If longitudinal strain for a wire is 0.03 and its poisson’s ratio is 0.5
If longitudinal strain for a wire is 0.03 and its poisson’s ratio is 0.5, then its lateral strain is
Options
(a) 0.003 (b) 0.0075 (c) 0.015 (d) 0.4
Correct Answer:
0.015
Explanation:
No […]