CBSE 2024 · Region 5 · Set 2 · Q4 · 1 mark
A galvanometer shows full scale deflection for a current $\displaystyle \mathrm{I}_{\mathrm{g}}$. If a shunt of resistance $\displaystyle \mathrm{S}_{1}$ is connected to the galvanometer, it gets converted into an ammeter of range $\displaystyle (0-\mathrm{I})$. When resistance of the shunt is made $\displaystyle \mathrm{S}_{2}$, its range becomes $\displaystyle (0-2 \mathrm{I})$. Then $\displaystyle \left(\frac{\mathrm{S}_{1}}{\mathrm{S}_{2}}\right)$ is
Official answer
From CBSE’s own marking scheme for this paper.
(C)
$\displaystyle \frac{2 \mathrm{I}-\mathrm{I}_{\mathrm{g}}}{\mathrm{I}-\mathrm{I}_{\mathrm{g}}}$
Moving Charges and MagnetismThe Moving Coil GalvanometerApplymcqmedium
More from Moving Charges and Magnetism
- A 2.0 cm segment of wire, carrying 5.0 A current in positive y-direction lies along y -axis, as shown in the…2024 · asked 3×
- Derive an expression for the magnetic field B, due to a circular coil of N turns, each of radius r carrying…2026 · asked 3×
- Assertion: A proton and an electron enter a uniform magnetic field B with the same momentum p such that p is…2024 · asked 3×
- (i) A particle of mass m and charge q is moving with a velocity v in a magnetic field B as shown in the…2024 · asked 3×
- Figure shows a narrow beam of electrons entering with a velocity of 3 × 10^7 m / s, symmetrically through the…2026 · asked 3×
- A 1 cm straight segment of a conductor carrying 1 A current in x direction lies symmetrically at origin of…2025 · asked 3×
- A rectangular loop carries a current of 1 A. A straight long wire carrying 2 A current is kept near the loop…2025 · asked 3×
- Assertion: Two long parallel wires, freely suspended and connected in series to a battery, move apart. Reason…2024 · asked 3×
CBSE Class 12 Physics past-paper question from the 2024board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.