Physics Test - ...

Two charges of \(-4 \mu \mathrm{C}\) and \(+4 \mu \mathrm{C}\) are placed at the points \(\mathrm{A}(1,0,4) \mathrm{m}\) and \(\mathrm{B}(2,-1,5) \mathrm{m}\) located in an electric field \(\overrightarrow{\mathrm{E}}=0.20 \hat{\mathrm{i}} \mathrm{V} / \mathrm{cm}\). The magnitude of the torque acting on the dipole is \(8 \sqrt{\alpha} \times 10^{-5} \mathrm{Nm}\), Where \(\alpha=\)___________

Zener diode is used as :

Which of the following is not a transducer?

A proton is moving in a uniform magnetic field B in a circular path of radius 'a' in a direction perpendicular to z-axis along which the field B exists. Calculate the angular momentum if charge on the proton is 'e'.

A ball balanced on a vertical rod is an example of:

An electron in the ground state of hydrogen atom is revolving in anti - clock wise direction in a circular orbit. The atom is placed normal to the electron orbit makes an angle of \(30^{\circ}\) in the magnetic field. Find the torque experienced by the orbiting electron?

A 600 mm long solenoid has 50 turns on it and is wound on an iron rod of 7.5 mm radius. Find the flux through the solenoid when the current in it is 3 A.

(Given: The relative permeability of iron is 600.)

If an electromagnetic radiation has an energy of 13.2 keV, then the radiation will belong to the region of:

Which of the following waves is used for telecommunication?