JEE MainPhysicsCurrent ElectricityMCQ+4 / −1
In the given circuit the the internal resistance of the 18 V cell is negligible. If R1 = 400 , R3 = 100 and R4 = 500 and the reading of an ideal voltmeter across R4 is 5V, then the value of R2 will be : 
- A300
- B450
- C550
- D230
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