Physics Test - ...

A car moving at a speed 'v' is stopped by a retarding force F in distance 's'. If the speed of the car were 3v, then the force needed to stop it within the same distance 's' would be:

The phenomenon of sound propagation in the air is:

Electric field of plane electromagnetic wave propagating through a non-magnetic medium is given by \(\mathrm{E}=20 \cos \left(2 \times 10^{10} \mathrm{t}-200 \mathrm{x}\right) \mathrm{V} / \mathrm{m}\). The dielectric constant of the medium is equal to (Take, \(\mu_{\mathrm{r}}=1\) )

The temperature determines the direction of net change of:

How many times a two stage rocket should be fired to launch a satellite in its proper orbit?

Atomic weight of a radioactive element is M gram/mol. Radioactivity of m gram of its mass is:

Two wires A and B are stretched by the same load. If the area of cross-section of wire ‘A’ is double that of ‘B’, then the stress on ‘B’ is:

Two deuterons undergo nuclear fusion to form a Helium nucleus. Energy released in this process is : (given binding energy per nucleon for deuteron=1.1 \(\mathrm{MeV}\) and for helium=7.0 MeV)

The type of electron emission wherein a very strong electric field applied to the metal pulls the electrons out of the metal surface is called:

For a simple Harmonic Oscillator, the potential energy is equal to kinetic energy: