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5 Cards in this Set
- Front
- Back
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Thermionic emission |
Thermionic emission is the emission of electron due to High surface |
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Therefore to cause a continuous flow of emitted electrons requires: |
1) A high Positive potential 2) A very low gas pressure |
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Convectional current |
An electric current is a stream of tiny moving particles called the electrons. The force needed to push the electrons along a conductor is called an electromotive force(e.m.f) supplied by the battery |
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The CRO(Cathode Ray Oscilloscope) |
The CRO is an instrument that show how voltage drop across a device varies with time. it works on the principle of deflection of an electron beam by an electric field. |
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Use of a CRO. |
A CRO can be used to measure short time interval.The CRO must be adjusted to lowest frequency range.The microphone is connected to the y-plate |
