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  • What is the approximate resistance setting of a rheostat ...
Multiple choice

What is the approximate resistance setting of a rheostat in which 750 mA of current flows with a 150 V source?

  1. 5 m ohm

  2. 5 Kohm

  3. 2 ohm

  4. 200 ohm

  5. 0.002 ohm

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

I= 750mA, I= 750*10^3A, V= 150V,R= V/I; R= 150/(750*10^3); R= 200 ohm.

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