Advanced Qualification · A-007 Feedlines and matching · A-007-009-002

Which of the following is not correct? Waveguide is an efficient transmission medium because it features:

1. A low copper loss
2. B low hysteresis loss
3. C low radiation loss
4. D low dielectric loss

Correct answer: B — low hysteresis loss. From the official ISED question bank, verified word for word.

Why

Hysteresis loss happens inside magnetic materials when they are repeatedly magnetized and demagnetized, but a waveguide is simply a hollow metal tube with no magnetic core to cause this effect. The full explanation — and one for every question — is in Pro.

Practise this section

Feedlines and matching at the advanced level: transmission line theory, impedance transformation, stubs and matching networks.

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