What Is a Planetary Nebula

question 63

Multiple Choice

What is a planetary nebula?

• A) The bipolar jets ejected by a T Tauri variable
• B) A planet surrounded by a glowing shell of gas
• C) The disc of gas and dust surrounding a young star that will soon form a solar system
• D) The ejected envelope, often bipolar, of a red giant surrounding a stellar core remnant
• E) A type of young, medium mass star

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Definitions:

Wire-Wound

Referring to a type of resistor or inductor where wire is wound around a core to create electrical resistance or inductance.

Variable Resistor

A resistor whose resistance value can be varied between its minimum and maximum values.

Ohmic Value

The resistance value of an electrical component measured in ohms, indicating how much it resists the flow of electric current.

Tolerance

The allowable deviation in the value of a component or system from its specified value, often expressed as a percentage.