The Voltage Between the Cathode and the Screen of a Television

question 63

Multiple Choice

The voltage between the cathode and the screen of a television set is 22 kV.If we assume a speed of zero for an electron as it leaves the cathode,what is its speed just before it hits the screen?

• A)8.8 × 10⁷ m/s
• B)2.8 × 10⁶ m/s
• C)6.2 × 10⁷ m/s
• D)7.7 × 10¹⁵ m/s
• E)5.3 × 10⁷ m/s

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Definitions:

Epiphyseal Plate

Also known as the growth plate, it is a hyaline cartilage plate in the metaphysis at each end of a long bone, where bone growth occurs in children and adolescents.

Medullary Cavity

The central cavity of bone shafts where red bone marrow and/or yellow bone marrow (fat) is stored.

Osteoporosis

A condition characterized by weakened bones that are more prone to fracture, often resulting from hormonal changes or deficiency of calcium or vitamin D.

Oversecreting

The condition wherein glands produce and release excessive amounts of hormones or other substances, potentially leading to various health issues.