Question
Download Solution PDFFind the current (in mA) flowing through a wire of resistance 25 kΩ when a potential difference of 12.5 V is applied across it.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFCONCEPT:
- Ohm’s law: At constant temperature and other physical quantities, the potential difference across a current-carrying wire is directly proportional to the current flowing through it.
V= RI
Where V is the potential difference, R is resistance and I is current.
EXPLANATION:
Given that:
Resistance (R) = 25 kΩ = 25 × 103Ω.
Potential difference (V) = 12.5 V.
Using Ohm's law:
V = R I
I =
Substitute above values:
I =
Current (I) = 0.5 mA.
- The electric current flowing through the wire is 0.5 mA. So option 1 is correct.
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