Physics Test - ...

The basic reason for the extraordinary sparkle of suitably cut diamond is that

Optical fiber works on the principle of

Which of the following physical quantities do not have same dimensions

When body is accelerated ______________________ .

There is a simple spring-mass system with a wooden block of mass m attached to a spring with a spring constant k. Which of the following expressions represents the velocity of the block as it passes through the equilibrium point x_owith an initial displacement of A?

A periscope works by the principle of

An air bubble in water will act like a

A potentiometer wire is 100 cm long and a constant potential difference is maintained across it. Two cells are connected in series first to support one another and then in opposite direction. The balance points are obtained at 50 cm and 10 cm from the positive end of the wire in the two cases. The ratio of the emf's is :

The direction of heat flow between two objects depends on

A man jumping out of a moving train is thrown