Student Login

Home›Chapters›Current Electricity PYQs›Kirchhoff's Laws & Measuring Instruments›Question 41

MHT CET 2024 (10 May, Shift 2) · Kirchhoff's Laws & Measuring Instruments

Kirchhoff's Laws & Measuring Instruments question from MHT CET 2024 (10 May, Shift 2)

Q41MHT CET 2024 · 10 MAY · SHIFT 2Easy

Kirchhoff's Laws & Measuring Instruments

In an ammeter, $0.25\%$ of main current passes through the galvanometer. If the resistance of the galvanometer is ' G ', the resistance of ammeter will be

Show answer and solution

Answer: (b)

$I_g = 0.25\% \text{ of } I = \frac{I}{400}$ , so $S = \frac{I_g G}{I - I_g} = \frac{G}{399}$ .
Ammeter resistance $R_A = \frac{SG}{S + G} = \frac{G/399 \cdot G}{G/399 + G} = \frac{G}{400}$
So the answer is (b) $\frac{1}{400}G$ .

Report a mistake

More questions on Kirchhoff's Laws & Measuring Instruments

Two identical galvanometers are converted into voltmeter and millivoltmeter. As compared…MHT CET 2024 (9 May, Shift 2)
In an ammeter, 4% of the main current is passing through the galvanometer, If shunt…MHT CET 2024 (9 May, Shift 1)
The range of voltmeter of resistance ' G ' Ω is ' V ' volt. The resistance required to be…MHT CET 2024 (3 May, Shift 1)
A galvanometer has a coil of resistance 200 Ω with a full scale deflection at 20. The…JEE Main 2024 (9 Apr, Shift 1)
In an ammeter, 5% of the main current passes through the galvanometer. If resistance of…JEE Main 2024 (1 Feb, Shift 2)
A galvanometer has a resistance of 50 Ω and it allows maximum current of 5 mA. It can be…JEE Main 2024 (1 Feb, Shift 1)
A galvanometer having coil resistance 10 Ω shows a full scale deflection for a current of…JEE Main 2024 (29 Jan, Shift 1)
A current of 200 deflects the coil of a moving coil galvanometer through 60°. The current…JEE Main 2024 (27 Jan, Shift 2)