Student Login

Home›Chapters›Current Electricity PYQs›Kirchhoff's Laws & Measuring Instruments›Question 139

JEE Main 2020 (5 Sep, Shift 2) · Kirchhoff's Laws & Measuring Instruments

Kirchhoff's Laws & Measuring Instruments question from JEE Main 2020 (5 Sep, Shift 2)

Q139JEE Main 2020 · 5 SEP · SHIFT 2Easy

Kirchhoff's Laws & Measuring Instruments

A galvanometer is used in laboratory for detecting the null point in electrical experiments. If, on passing a current of 6 mA it produces a deflection of 2°, its figure of merit is close to:

Show answer and solution

Answer: (c)

Figure of merit $G = \frac{I}{\theta}$ (current per division).
$G = \frac{6\ \text{mA}}{2\ \text{div}} = 3\ \text{mA/div}$
So the answer is (c) $3 \times 10^{-3}$ A/div.

Report a mistake

More questions on Kirchhoff's Laws & Measuring Instruments

For the circuit shown in the figure, the current I will beNEET 2020 (Phase 2)
In the figure shown, the current in the 10 V battery is close to:JEE Main 2020 (6 Sep, Shift 2)
The current I1 (in A) flowing through 1 Ω resistor in the following circuit is:JEE Main 2020 (7 Jan, Shift 1)
Four resistances 40 Ω, 60 Ω, 90 Ω and 110 Ω make the arms of a quadrilateral ABCD. Across…JEE Main 2020 (4 Sep, Shift 2)
In the circuit, given in the figure currents in different branches and value of one…JEE Main 2020 (5 Sep, Shift 2)
The value of current i1 flowing from A to C in the circuit diagram is:JEE Main 2020 (4 Sep, Shift 2)
In the given circuit diagram, a wire is joining points B and D. The current in this wire…JEE Main 2020 (9 Jan, Shift 1)
Two resistors 400 Ω and 800 Ω are connected in series across a 6 V battery. The potential…JEE Main 2020 (3 Sep, Shift 2)