Answer to Question #240737 in Optics for Ayo

Question #240737

The fsd of a moving coils instrument is 20amperes calculate the value of the resistance to be connected to it in other to measure 5kv if its internal resistance is 20ohms

Expert's answer

The current is

"I=\\frac{V}{R+r},"

express resistance R:

"R=\\frac{V}{I}-r=230\\Omega."

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