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.
Resistance (R) of a resistor is given by Ohm’s law as,V= IR
Potential difference, V= 12 V
Current in the circuit, I= 2.5 mA = 2.5 x 10-3 A
`R=12/(2.5xx 10^-3)=-4.8xx10^3Omega=4.8 kOmega`
Therefore, the resistance of the resistor is 4.8 kΩ
Concept: Ohm's Law (V = IR)
Is there an error in this question or solution?
Video TutorialsVIEW ALL 
Video Tutorials For All Subjects
- Ohm's Law (V = IR)