The wavefunction of a many-electron atom is very complicated. The orbital approximation states that a reasonable first approximation to this exact wavefunction is obtained by thinking of each electron as occupying its ‘own’ orbital. The individual orbitals can be assumed to resemble the hydrogenic orbitals. The following figure shows (a) a contour plot in the xy plane and (b) the radial function. Please identify the orbital. (Hints: the contour plot and radial function indicate the number of angular nodes/nodal planes and radial nodes, respectively; treat this as hydrogen orbital).

Which type of current is used in a portable X-ray machine?

Which of the following will increase the amount of voltage during electromagnetic induction?  

What happens to the magnetic field around the coil of wire when AC current passes through?

During the power loss formula, which unit is responsible for measuring the power supplied to the electrical circuit?  

Why is the Earth’s magnetic field the weakest?

Which type of transformer is used to change the voltage lower level for thermionic emission in the X-ray tube?

Which waveform is similar to the high-frequency waveform?

Electrical current flows in which direction?

What happens to the amount of current if the voltage is increased to kVp in a step-up transformer?