1.

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

Answer»

Solution :Here voltage of BATTERY V=12V and current `I=2.5mA=2.5 times 10^-3 A`
`therefore` RESISTANCE `R=V/I=12/(2.5 times 10^3)=4800 Omega=4.8 times 10^3 Omega=4.8 K Omega`


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