A spherical liquid drop of radius R is divided into 8 equal droplets. If the surface tension is T, then work done in the process will be
Options
(a) 2πR²T (b) 3πR²T (c) 4πR²T […]
The surface tension of soap solution is 0.03 N/m. The work done in blowing to form a soap bubble of surface area 40 cm², in joules is
Options
(a) 1.2×10⁻⁴ (b) 2.4×10⁻⁴ (c) 12×10⁻⁴ […]
Which of the following substances has the highest elasticity?
Options
(a) Steel (b) Copper (c) Rubber (d) Sponge
Correct Answer:
Steel
Explanation:
No explanation available. Be the first to write the explanation for this […]
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 […]
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