A Flashlight Bulb Operating at a Voltage of 3 V

question 28

Multiple Choice

A flashlight bulb operating at a voltage of 3 V has a resistance of 10 Ω.How many electrons pass through the bulb filament per second (e = 1.6 × 10−¹⁹ C) ?

• A) 0.5 × 10¹⁶
• B) 4.8 × 10²¹
• C) 5.3 × 10¹⁷
• D) 1.9 × 10¹⁸
• E) ​2.1 × 10²⁰

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Definitions:

Vector Class

A part of the Java Collection Framework, the Vector class represents a dynamic array that can grow or shrink in size, allowing it to contain a variable number of elements of any type.

Set Interface

An interface in Java representing a collection that cannot contain duplicate elements.

Concrete Class

A class in Java or other object-oriented programming languages that has an implementation and can be instantiated.

HashSet< T >

HashSet<T> in Java is a collection that stores unique elements only, providing efficient operations like add, remove, and check for the presence of elements.