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Choose the correct statement...

Choose the correct statement

A

Terminal velocities of rain drops are proportional to square of their radii

B

Water proof agents decrease the angle of contact between water and fibres

C

Detergents increase the surface tension of water

D

Hydraulic machines work on the principle of Torricelli's law:

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SARAS PUBLICATION-MODEL QUESTION PAPER 6-EXERCISE
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  3. Choose the correct statement

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  5. If the energy input to a Carnot engine is thrice work it performs then...

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  6. The ratio of rms speed of an ideal gas molecules at pressure p to that...

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  8. The physical quantity which remains constant in simple harmonic motion...

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  9. transverse waves:

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  10. If a closed organ pipe has the same third harmonic frequency as that o...

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  11. A particle of mass 1.96 xx 10^(-15)kg is kept in equilibrium between t...

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  12. Two small spherical shells A and B are given positive charges of 9 C a...

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  13. Identify the wrong statement.

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  14. When the rate of flow of charge through a metallic conductor of non-un...

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  15. The resistance of a carbon resistor of colour code Red Red Green Silve...

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  16. The slope of the graph showing the variation of potential difference V...

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  17. When the temperature of a magnetic material decreases, the magnetizati...

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  18. The magnetic field at the centre of a circular coil carrying current I...

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  19. In an LCR series resonant circuit, the capacitance is changed from C a...

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  20. Changing magnetic fields can set up current loops in nearby metal bodi...

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