Question

Coaxial cable offers a band width approximately \(\mathrm{MHz}\) (A) 1 (B) 20 (C) 250 (D) 1000

Short answer

The correct answer is option (C) with a bandwidth of 250 MHz, which is more in line with what is expected from typical coaxial cables in modern communication systems.

Step-by-step solution

Option Elimination

To determine the correct answer, we can use our knowledge of coaxial cable properties and the concept of bandwidth in communication systems.

Evaluate Option (A)

Option (A) suggests a bandwidth of 1 MHz. Most coaxial cables used in communication systems typically offer higher bandwidth than this, making this option unlikely to be correct.

Evaluate Option (B)

Option (B) suggests a bandwidth of 20 MHz. This value might be found in older cable systems. However, modern coaxial cables can offer significantly higher bandwidths.

Evaluate Option (C)

Option (C) suggests a bandwidth of 250 MHz. This value is more in line with what would be expected for a coaxial cable in modern communication systems. Coaxial cables are widely used in cable television (CATV) systems and offer high bandwidth to accommodate multiple channels and internet connections.

Evaluate Option (D)

Option (D) suggests a bandwidth of 1000 MHz (1 GHz). This value is higher than typical coaxial cable bandwidths. While some specialty coaxial cables might offer such high bandwidth, it is not common for general use.

Select the Correct Answer

Based on the evaluations of each option, the most likely correct answer is option (C) with a bandwidth of 250 MHz, which is more in line with what is expected from typical coaxial cables in modern communication systems.

Key concepts

Communication Systems

In today's world, communication systems play a crucial role in connecting devices and enabling seamless data transmission. These systems use various technologies to facilitate the transfer of information from one point to another. Coaxial cables are a critical component of communication systems, especially in providing last-mile connectivity. They are designed to transmit high-frequency electrical signals efficiently.
Coaxial cables operate by encapsulating signals within an insulated core, thereby minimizing signal loss and interference. Their structure allows for high-speed data transfer, making them an ideal choice for many communication applications.

• Reliable signal transmission through shielded design
• Support for different bandwidth requirements
• Widely used in various applications including television and internet

Communication systems leveraging coaxial cables can support a wide range of services—from audio and video signals to high-speed internet—offering versatility and dependability.

Cable Television (CATV)

Cable television (CATV) is one of the most common applications of coaxial cables. These cables are known for their ability to deliver multiple channels and high-quality video signals over long distances. In CATV systems, coaxial cables are used to distribute television signals to users' homes. They support a broad spectrum of channels over a single cable, thanks to their impressive bandwidth capabilities.
Historically, CATV started with basic analog transmission, but with the advent of digital technology, the quality and number of channels have improved significantly. Modern CATV systems can deliver high-definition and pay-per-view content, as well as broadband internet, all through the same coaxial infrastructure.

• Allows simultaneous transmission of multiple channels
• Supports digital, high-definition broadcasts
• Integral for providing internet services alongside TV

CATV networks have been a staple in advancing entertainment delivery and continue to evolve with newer technologies.

Bandwidth Evaluation

Evaluating the bandwidth of coaxial cables is crucial for determining their suitability for various applications. Bandwidth refers to the capacity of a cable to transmit data effectively, and it directly impacts the number of services a coaxial cable can support. Coaxial cables can vary significantly in terms of bandwidth, depending on their construction and intended use.
Generally, coaxial cables used in communication systems today offer bandwidths ranging from a few hundred MHz to several GHz in more advanced models. This wide range allows for flexibility in usage, catering to both simple applications like analog television and more demanding services such as internet backbones.

• Bandwidth dictates data transfer speed and capacity
• High bandwidths enable more simultaneous services
• Varies by cable type and application needs

Understanding bandwidth requirements is essential when choosing coaxial cables to ensure compatibility and performance.

Modern Coaxial Cables

Modern coaxial cables have undergone significant advancements to meet the growing needs of communication systems. With technological improvements, these cables have seen enhancements in materials, design, and overall performance. They are now capable of supporting higher bandwidths, lower signal loss, and better resistance to external interference.
The development of new dielectric insulation materials and improved shielding techniques have led to more durable and efficient cables. Modern coaxial cables are not only more robust but also more eco-friendly, with some manufacturers focusing on recyclable materials.

• Enhanced materials leading to better performance
• Improved design for higher efficiency
• Focus on sustainability in production

These improvements ensure that coaxial cables remain relevant and effective in meeting the demands of current and future communication technologies.