Physics

The spherical shape of rain drop is due to 

(a)  

• density of the liquid
• surface tension
• atmospheric pressure
• gravity

FOR A PARTICLE MOVING ALONG A CIRCULAR PATH, THE ANGULAR VELOCITY ω  IS DIRECTED..........

What is the surface tension of boiling water?

• Zero

• Infinity

• 100 times than that at 0degree celsius

Pressure is a ________ quantity.

Angle of banking does not depend upon

• gravitational acceleration

• speed of the vehicle

• radius of curvature of road

• mass of the vehicle

  Two capillary tubes of radii 0.3 cm and 0.6 cm are dipped in the same liquid. The ratio of heights through which the liquid will rise in the tubes is  

• 1:2

• 2:1

• 1:4

• 4: 1

  In Bernoulli’s theorem, which of the following is conserved  

• linear momentum

• angular momentum

• mass

• energy

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When a car takes turn on a horizontal curved road, the centripetal force provided by..

• weight of the car

• normal reaction by road on car

• frictional force between road surface and tyre of car

• centrifugal force

A photocell is used to automatically switch on the street lights in the evening when the sunlight is low in intensity. Thus, it has to work with visible light. The material of the cathode of the photo cell is

• zinc

• aluminum

• nickel

• potassium

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A diver in a swimming pool bends his head before diving. It

• Increases his linear velocity

• Decreases his angular velocity

• Increases his moment of inertia

• Decreases his moment of inertia