Physics Test - ...

A long string with a charge of \(\lambda\) per unit length passes through an imaginary cube of edge a. The maximum flux of the electric field through the cube will be:

Let \(v_{1}\) be the frequency of the series limited of the Lyman series, \(v_{2}\) be the frequency of the first line of the Lyman series, and \(v_{3}\) be the frequency of the series limited of the Balmer series. Then:

The work function of tungsten is \(4.50 \mathrm{eV}\). The wavelength of the fastest electron emitted when light whose photon energy is \(5.50 \mathrm{eV}\) falls on a tungsten surface, is?

A small telescope has an objective lens of focal length \(150 \mathrm{~cm}\) and an eyepiece of focal length \(5 \mathrm{~cm}\). if this telescope is used to view \(100 \mathrm{~m}\) high towers \(3 \mathrm{~km}\) away. Find the height of the final image when it is formed \(25 \mathrm{~cm}\) away from the eyepiece.

A quantity of heat \(Q\) is supplied to a monoatomic ideal gas which expands at constant pressure. The fraction of heat that goes into work done by the gas is:

A satellite of mass M is orbiting in an orbit of radius R. Workdone by gravity per revolution on the satellite is given by:

The magnetic moment is a:

Two equal charges q are kept fixed at -a and +a along the x-axis. A particle of mass m and charge \(\frac{q}{2}\) is brought to the origin and given a small displacement along the x-axis, then:

The work-energy theorem equates the change in the kinetic energy of an object to:

The top of lake is frozen as the atmospheric temperature is \(-10^{\circ} C\). The temperature at the bottom of the lake is most likely to be _______.