A non-ideal voltmeter and a non-ideal ammeter are connected as shown in the figure. The reading of the voltmeter is 20 V and that of the ammeter is 4 A. The value of R is :

Engineering

Physics

Galvanometer Ammeter and Voltmeter

Question

less than $5 Ω$

greater than $5 Ω$

may be less than $5 Ω$

$5 Ω$

LiveFree JEE Main Previous Year Online Papers Live Free JEE Advance Previous Year Online Papers

College PredictorLive

Know your College Admission Chances Based on your Rank/Percentile, Category and Home State.

Get your JEE Main Personalised Report with Top Predicted Colleges in JoSA

we have 20 = 4(R_A + R)

so R + R_A = 5

so R = 5 – R_A < $5 Ω$