A wire is stretched under a force. If the wire suddenly snaps the temperature of the wire
Options
(a) remains the same (b) decreases (c) increases (d) first decreases then increases
Correct Answer:
increases
The area of cross-section of one limb of an U-tube is twice that of the other. Both the limbs contain mercury at the same level. Water is poured in the wider tube so that mercury […]
If the volume of a block of aluminium is decreased by 1%, the pressure (stress) on its surface is increased by (Bulk modulus of Al=7.5×10¹⁰ Nm⁻²)
Options
(a) 7.5×10¹⁰ Nm⁻² (b) 7.5×10⁸ Nm⁻² (c) […]
Work of 3.0×10⁻⁴ joule is required to be done in increasing the size of a soap film from 10cm x 6cm to 10cm x 11cm. The surface tension of the film is
Options
(a) […]
In old age arteries carrying blood in the human body become narrow resulting in an increase in the blood pressure. This follows from
Options
(a) Pascal’s law (b) Stoke’s law (c) Bernoulli’s principle (d) […]
Surface tension of water will be minimum at
Options
(a) 0⁰C (b) 25⁰C (c) 60⁰C (d) 75⁰C
Correct Answer:
75⁰C
Explanation:
No explanation available. Be the first to write the explanation for this question […]
The surface tension of a liquid is 5 newton per metre. If a film is held on a ring of area 0.02 metre², its surface energy is about
Options
(a) 5×10⁻² J (b) 2.5×10⁻² […]
Which of the following rods of same material undergoes maximum elongation when subjected to a given force?
Options
(a) l=1 m, d=2 mm (b) l=2 m, d=1 mm (c) l=1 m, d=1 mm (d) […]
Water flows through a pipe. The area of cross-section at one place A₁=10 cm², velocity of flows 1 m/s and pressure 2000 Pa. At another place area A₂= 5 cm². What is the pressure at […]
A layer of glycerine of thickness 1 mm present between a large surface area of 0.1 m². With what force the small surface is to be pulled, so that it can move with a velocity […]
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