1.

98. In the folowing circuit, the resistance of the voltmeteris 10,000 Ω and that of the ammeter is 20 Ω . If thereading of the ammeter is 0.1 A and that of the 10voltmeter is 12 V, then the value of R is :-(1) 122 Ω(2) 100 Ω(3) 118Ω(4) 116210

Answer»

reading in the Voltmeter will give the potential difference across combination of R and A

so, V = 12v , and since current is 0.1A

so, 12 = 0.1(R+20)

=> 120 = R+20=> R = 120-20 = 100Ω

option 2



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