Physics Test - ...

If there is a positive error of \(50 \%\) in the measurement of velocity of a body, then the error in the measurement of kinetic energy is :

Which of the following figures represents the variation of particle momentum and associated de Broglie wavelength?

For transistor action, which of the following statements is correct?

A ray of light passes through four transparent media with refractive indices \(\mu_{1}, \mu_{2}, \mu_{3},\) and \(\mu_{4}\) as shown in the figure below. The surfaces of all media are parallel. If the emergent ray \(CD\) is parallel to the incident ray \(AB\), we must have:

Two projectiles are projected with the same velocity. If one is projected at an angle of \(30^{\circ}\) and the other at \(60^{\circ}\) to the horizontal. What will be the ratio of maximum heights?

The refractive index of a material is given by the equation \(n=\frac{A+B}{\lambda^{2}}\), where \(A\) and \(B\) are constant. The dimensional formula for \(B\) is:

A wire of length L meters carrying a current I amperes is bent in the form of a circle. The magnitude of the magnetic moment is:

Nucleus a having \(\mathrm{Z}=17\) and equal number of protons and neutrons has \(1.2 \mathrm{MeV}\) binding energy per nucleon.

Another nucleus B of Z \(=12\) has total 26 nucleons and \(1.8 \mathrm{MeV}\) binding energy per nucleons.

The difference of binding energy of \(B\) and \(A\) will be _________\(\mathrm{MeV}\).

A body cools in 7 minutes from \(60^{\circ} C\) to \(40^{\circ} C\). The temperature of the surrounding is \(10^{\circ} C\). The temperature of the body after the next 7 minutes will be: