The Intensity of a Radiation Beam Is Measured at 10

question 24

Multiple Choice

The intensity of a radiation beam is measured at 10 mR/hr at a distance of 20 cm.What will be the intensity of this beam at 30 cm?

• A) 22.5 mR/hr
• B) 4.44 mR/hr
• C) 6.67 mR/hr
• D) 15 mR/hr

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Definitions:

Neutral Plane

The region in a rotating electrical machine where the magnetic field does not induce any electromotive force in the armature.

Synchronous Winding

A winding configuration in an electric machine that operates at a speed directly proportional to the frequency of the electric power supply.

Repulsion Motor

A type of single-phase motor that uses repulsion of magnetism to operate.

Magnetic Poles

The regions at the ends of a magnet where the magnetic field is strongest, designated as north and south poles.