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What is the resistance?

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1. An ammeter registers 2.5 A of current in a wire that is connected to a 9.0 V battery. What is the wire's resistance?
2. A small electronic device is rated at 0.25 W when connected to 120 V. What is the resistance of this device?

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Solution Summary

The resistance current wires are found the ammeters. The small electronic device that connects voltages are analyzed.

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1.)
Because,
Current (I) = 2.5 A
Potential difference (V) = 9.0 V

Resistance (R) = ...

Solution provided by:
Amrit Lal Ahuja, PhD (IP)
Education
  • BEng, Allahabad University, India
  • MSc , Pune University, India
  • PhD (IP), Pune University, India
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