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When a 12 V battery is connected across ...

When a 12 V battery is connected across an unknown resistor there is a current of 2.5 mA in the circuit. Find the value of the resistance of the resistor.

Text Solution

Verified by Experts

Resistance (R) of a resistor is given by Ohm.s law as
V=I
R=V/I
where
Potential difference V=12V
Current in the circuit I=2.5 mA=`2.510^(-3)A`
`R=(12)/(2.5xx10^(-3))=4.8xx10^3Omega=4.8kOmega`
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