Test-bank-principles-of-computer-networks-and-communications-1st-edition-dumas Questions with 100% Correct Answers | Updated & Verified

Chapter 2 The Modern Signal Carriers: Electricity, Light, Media, and Impairments True-False Questions 1. Electricity consists of a flow of electrons called current, whose magnitude is measured in ampere and strength in volts. Answer: True Difficulty: Easy Page Reference: 26 2. Signals progress along a medium by a process called propagation. Answer: True Difficulty: Easy Page Reference: 26 3. The ampere, a unit of measure of the magnitude of electrical current, is named after Andre Marie Ampere, a French mathematician, chemist, and physicist. Answer: True Difficulty: Medium Page Reference: 28 4. The volt, a unit of measure of electrical potential or pressure, is named after the Italian physicist Alessandro Giuseppe Volta (), who did much pioneering work in electricity. Answer: False Difficulty: Easy Page Reference: 28 5. The ohm, a measure of resistance to current flow, is named after Georg Simon Ohm, a German mathematician who investigated electricity and magnetism. Answer: True Difficulty: Easy Page Reference: 28 6. The type of electricity most relevant to telecommunications is alternating current (AC) – the kind that utility companies provide. Answer:True Difficulty: Easy Page Reference: 28 7. Sine waves are not periodic. Answer:False Difficulty: Medium Page Reference: 30 8. The distance a wave travels in one cycle is its wavelengt