Physics Test-23...

A particle of mass \(m\) carrying charge \(+q_{1}\) is revolving around a fixed charge \(-q_{2}\) in a circular path of radius \(r\). Calculate the period of revolution.

The dimensional formula for inductance is:

Masses of nucleus, neutron and proton are \(M\) , \(m_n\) and \(m_p\)respectively. If nucleus has been divided into neutrons and protons, then

In a moving coil galvanometer, if the current flowing through it is increased, then the deflection in the coil will:

The center of mass of a rigid body lies:

Submarines works on which of the following principle?

Which of the following is correct regarding eddy currents in the coil?

Carbon, silicon and germanium have four valence electrons each. These are characterised by valence and conduction bands separate by energy band gap respectively equal to \(\left(E_{g}\right)_{S i},\left(E_{g}\right)_{c}\) and \(\left(E_{g}\right)_{G e}\). Which of the following statements is true?

A bomb of 12 kg divides in two parts whose ratio of masses is 1 : 3. If the kinetic energy of the smaller part is 216 J, then the momentum of the bigger part in kg-m/s will be:

A light bulb and an open coil induction are connected in series to an ac source as shown in figure. Now an iron rod is inserted into the interior of the inductor. The glow of the light bulb will be: