What Is the Work Function, E_A, of a Metal from Which

question 31

Multiple Choice

What is the work function, E_A, of a metal from which electrons are ejected with kinetic energy E_kin = 0.5 eV, and the incident light has a wavelength of ë = 460 nm? [h = 6.63 × 10^-34 J s, c = 3 × 10⁸ m/s, 1 eV = 1.6 × 10^-19 J]

• A)1.7 eV
• B)2.2 eV
• C)4.2 eV
• D)4.7 eV

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Definitions:

Input Torque

The torque applied to a system or component, often measured to understand the mechanical power required to operate a device or machinery.

Armature Excitation

The process of applying voltage to the armature winding of a generator or motor, which induces magnetic fields and enables motion or power generation.

Cumulative-compound

A term that could be misinterpreted outside a specific context; without additional information, it suggests a complex or combined effect or entity, possibly accumulating over time. NO

Shunt Field

A magnetic field created by a shunt winding in electrical machinery, used for regulation of the machinery's operation.