Microwaves are _ waves.
Correct answer: D. Transverse and electromagnetic
- A. Tranverse
- B. Electromagnetic
- C. Longitudinal
- D. Transverse and electromagnetic
Explanation
Microwaves are electromagnetic waves of wavelength ranging from 1 mm to 30 cm. Their frequencies range between 1,000 to 300,000 MHz. Electromagnetic waves like microwaves are transverse waves. Their electrical and magnetic components vibrate at right angles to each other and the direction of propagation. These types of waves can travel through a vacuum; they do not require a medium.
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About Alternating Current
Alternating current varies periodically, so phase relationships become essential when current passes through a resistor, capacitor or inductor. The chapter distinguishes resistance from capacitive and inductive reactance, explains phase lead and lag, and connects changing electric and magnetic fields with the production and properties of electromagnetic waves.
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592 free Alternating Current MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
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