Student Login

Home›Chapters›Current Electricity PYQs›Kirchhoff's Laws & Measuring Instruments›Question 95

MHT CET 2023 (9 May, Shift 2) · Kirchhoff's Laws & Measuring Instruments

Kirchhoff's Laws & Measuring Instruments question from MHT CET 2023 (9 May, Shift 2)

Q95MHT CET 2023 · 9 MAY · SHIFT 2Medium

Kirchhoff's Laws & Measuring Instruments

A galvanometer of resistance $20\ \Omega$ gives a deflection of 5 divisions when $1\text{ mA}$ current flows through it. The galvanometer scale has 50 divisions. To convert the galvanometer into a voltmeter of range 25 volt, we should connect a resistance of

Show answer and solution

Answer: (b)

5 divisions per mA, so full scale (50 divisions) $I_g = 10\text{ mA} = 0.01\text{ A}$ .
Series resistance $R = \dfrac{V}{I_g} - G = \dfrac{25}{0.01} - 20$
$R = 2500 - 20 = 2480\ \Omega$ in series
So the answer is (b).

Report a mistake

More questions on Kirchhoff's Laws & Measuring Instruments

For designing a voltmeter of range 50 V and an ammeter of range 10 mA using a…JEE Main 2023 (15 Apr, Shift 1)
When a resistance of 5 Ω is shunted with a moving coil galvanometer, it shows a full…JEE Main 2023 (13 Apr, Shift 1)
The current sensitivity of moving coil galvanometer is increased by 25%. This increase is…JEE Main 2023 (11 Apr, Shift 1)
The number of turns of the coil of a moving coil galvanometer is increased in order to…JEE Main 2023 (31 Jan, Shift 2)
A student is provided with a variable voltage source V, a test resistor RT = 10 Ω, two…JEE Main 2023 (6 Apr, Shift 2)
A galvanometer of resistance 200 Ω is to be converted into an ammeter. The value of shunt…MHT CET 2022 (11 Aug, Shift 2)
A 72 Ω galvanometer is shunted by a resistance of 8 Ω. The percentage of the total…JEE Main 2022 (27 Jun, Shift 1)
The current I drawn out of the battery connected in the given circuit is:JEE Main 2022 (30 Jul, Shift 2)