Physics Test - ...

A thermodynamic system is taken through the cycle \(A B C D\) as shown in the figure. Heat rejected by the gas during the cycle is:

An electric bulb is connected to a 200 V generator. The current is 0.5 A. The power of the bulb is:

What is the mass of an object that requires a force of \(90 \mathrm{~N}\) to accelerate at a rate of \(2.6\) \(\mathrm{m} / \mathrm{s}^{2}\) ?

The energy required to remove the electron from a singly ionized Helium atom is 2.2 times the energy required to remove an electron from Helium atom. The total energy required to ionize the Helium atom completely is:

The iron blade has a ring in which the wooden handle is fixed. The ring is slightly smaller in size than a wooden handle. The ring is heated. When the ring cools, it ______________ and tightly fits on the handle.

Kinematics pairs are those which have two elements that ______________.

When light is incident on a metal surface the maximum kinetic energy of emitted electrons:

When the optical power incident on a photodiode is 10 µW and the responsivity is 0.8 A/W, the photocurrent generated (in µA) is ____.

A bifocal lens is used as a remedy in which of the following defects in the eyes?

Consider a spherical shell of radius \(R\) at temperature \(T\). The black body radiation inside it can be considered as an ideal gas of photons with internal energy per unit volume \(u=\frac{U}{V} \alpha T^{4}\) and pressure \(P=\frac{1}{3}\left(\frac{U}{V}\right)\). If the shell now undergoes an adiabatic expansion the relation between \(T\) and \(R\) is: