Which one of the following is not the advantage of...

Which one of the following is not the advantage of semi-conductor device in the electron tubes?
(a) Unlimited life
(b) Greater efficiency
(c) No-warming up time for switching
(d) Low consumption of power for cathode heating

Key Concepts

Semiconductor Devices

Semiconductor devices are built using solid-state materials like silicon or germanium and are fundamental to modern electronics due to their high efficiency, reliability, compact size, and capability for rapid switching. Their structure enables them to operate at room temperature without the need for additional heating elements.

Electron Tubes

Electron tubes, or vacuum tubes, control electron flow in a vacuum and were widely used in early electronics. They require a heated cathode to emit electrons, resulting in greater power consumption and a need for a warm-up period, as well as being bulkier and having a shorter operational life compared to semiconductor devices.

Advantages over Electron Tubes

In the transition from electron tubes to semiconductor devices, advantages such as longer life, improved efficiency, and the elimination of warm-up time have been critical. Semiconductor devices do not require the energy-intensive cathode heating that electron tubes do, which contributes to their overall efficiency and performance.

Heating Requirement in Electron Tubes

One of the significant drawbacks of electron tubes is the necessity for cathode heating to function properly. This heating requirement leads to a higher power consumption compared to semiconductor devices, which operate efficiently without such pre-heating, making the characteristic of low consumption for cathode heating irrelevant as an advantage in semiconductor technology.

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