Question Library

The bond between silicon and germanium is

The bond between silicon and germanium is

In order to remove the error of parallax when taking measurements with a metre rule, the eye should be focused

Calculate the total distance covered by a train before coming to rest if its initial speed is 30ms-1 with a constant retardation of 0.1m-2

If a freely suspended object is pulled to one side and released, it oscillates about the point of suspension because the

An object of mass 20kg slides down an inclined plane at an angle of 30o to the horizontal. The coefficient of static friction is? [g = 10ms-2]

I. It is a rapid, constant and irregular motion of tiny particles. II. It gives evidence that tiny particles of matter called molecules exist. III. It takes place only in gases. IV. It gives evidence that molecules are in a constant state of random motion. which of the combinations above is correct about Brownian notion?

A pinhole camera is placed 300m in front of a building so that the image is formed on a screen 5cm from the the pinhole. If the image is 2.5cm high, the height of the building will be

A glass block of thickness 10cm is placed on an object. If an observer views the object vertically, the displacement of the object is

The p-n junction diodes can act as rectifiers because they

If it takes an object 3s to fall freely to the ground from a certain height, what is the distance covered by the object?

If a tube of small radius opened at both ends is placed in a liquid, the liquid will

An object weighs 22 kg in water and 30kg in air. what is the upthrust exerted by the liquid on the object. [g = 10 ms2]

A copper wire was subjected to a tensile stress of 7.7 x 10\(^7\). Calculate the strain of the wire. [Young modules = 1.1 x 10\(^11\) Nm\(^{-2}\)]

Which of the following could be effectively used to reduce friction?