Precautions that should be observed while handling MOSFETS.
- Never insert or remove MOSFET from a circuit with the power ON.
- Never apply input signal when DC power supply is OFF.
- Wear a grounding strap on your wrist when handling the MOSFET device.
Properties of a cathode used in thermionic valves.
It should have a low work function. A low work function helps to emit electrons from the cathode surface in a comparatively lower temperature It should have a high melting point. The temperature required to emit an electron from the cathode surface is quite high compared to the melting point of normal metals. A lower melting point causes vaporization of metals before they emit electrons. It should have high mechanical strength.
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