In the given circuit, the voltmeter records 5 volt. The resistance of the voltmeter in ohms is

Let R be the resistance of voltmeter as shown in figThe resultant ,resistance of the circuitRresultant =R×100R+100+50=R×100+50×(R+100)(R+100)=150R+5000R+10′0The current flowing ir.t the circuiti=10V[(150R+5000) ′(R+100)]The voltage across AB, i.e., V' is given by V′=i×RAB=10[(150R+5000)/(R+100)]×R×100R+1005=10150R+5000×(R×100)Solving, we get R = 100 Ω