A Metal Having a Work Function of 2

question 2

Multiple Choice

A metal having a work function of 2.8 eV is illuminated with monochromatic light whose photon energy is 3.9 eV.What is the threshold frequency for photoelectron production? ,1 eV = 1.60 × 10^-19 J)

• A) 6.8 × 10¹⁴ Hz
• B) 2.7 × 10¹⁴ Hz
• C) 7.6 × 10¹⁴ Hz
• D) 8.5 × 10¹⁴ Hz
• E) 9.4 × 10¹⁴ Hz

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Definitions:

Insecurely Attached

A term from attachment theory indicating a lack of a secure emotional bond between a child and their caregiver, often leading to difficulties in relationships.

Egocentric

Relating to the inability to differentiate between one's own perspective and someone else's perspective, common in early childhood development.

Parenting Style

The manner in which a parent or caregiver raises and guides their child, often categorized into types such as authoritarian, authoritative, permissive, and uninvolved.

Negligent

Failing to take proper care in doing something, which typically results in damage or harm to others.