For designing a voltmeter of range 50 V and an ammeter of range 10 mA using a galvanometer which has a coil of resistance 54Ω showing a full scale deflection for 1 mA as in figure. (A) for voltmeter R

Question

For designing a voltmeter of range 50 V and an ammeter of range 10 mA using a galvanometer which has a coil of resistance 54Ω showing a full scale deflection for 1 mA as in figure. (A) for voltmeter R ≈ 50 k Ω (B) for ammeter r ≈ 0.2Ω (C) for ammeter r ≈ 6Ω (D) for voltmeter R ≈ 5 k Ω (E) for voltmeter R ≈ 500Ω Choose the correct answer from the options given below:

TestHub · Accepted Answer

The resistance is given by R = I g ​ V ​ − G ⇒ 1 0 − 3 50 ​ − 54 ≈ 50 k Ω For ammeter, S = I − I g ​ I g ​ G ​ ⇒ S = ( 10 − 1 ) × 1 0 − 3 1 0 − 3 × 54 ​ = 6Ω

Physics - Current Electricity Question with Solution | TestHub

Options:

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