Which Object Will Emit More Electromagnetic Radiation Than It Absorbs

question 40

Multiple Choice

Which object will emit more electromagnetic radiation than it absorbs from its surroundings?

• A)a 600 °C copper sphere in a 700 °C oven
• B)a girl scout sitting close to a campfire
• C)an ice cube in beaker of water at 50 °C
• D)a 200 °C copper coin in a beaker of water at 98 °C
• E)an ice cube in thermal equilibrium with the interior of a freezer

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Definitions:

LED Indicator

A light-emitting diode used as a visual signal to represent the status or condition of a device, operation, or process.

Electrical Noise Interference

Unwanted disturbances superimposed on a useful signal that tend to obscure its information content, often caused by electromagnetic disturbances.

Logic Circuits

Electronic circuits that implement logical functions, they are the building blocks of digital devices, able to process binary data input into specific outputs.

I/O System

An Input/Output System is the component of a computer or PLC responsible for communication with the external environment through devices like sensors and actuators.