Q:- The magnetic field is strongest when:

A. The item is demagnetised

B. The magnetising voltage is reversing

C. The magnetising current is not flowing

D. The magnetising current is flowing

Q:- In a betatron, electrons complete _____ prior to being deflected at a target.

(A). 1 Revolution
(B). Several dozen of revolutions
(C). Tens of thousands of revolutions
(D). Hundreds of thousand revolutions

Q:- Most modern x-ray units (post 1980's) utilize _____ circuits to provide smooth high voltage supplies to the x-ray tube.

(A). Thyristor-based
(B). Villard
(C). Triode
(D). Diode