Three voltmeters, all having different internal resistances are joined as shown in figure. When some potential difference is applied across A and B, their readings are $V_1$, $V_2$ and $V_3$.
Choose the correct option.
Three voltmeters, all having different internal resistances are joined as shown in figure. When some potential difference is applied across A and B, their readings are $V_1$, $V_2$ and $V_3$.
Choose the correct option.
- $V_1 = V_2$
- $V_1 \neq V_3 - V_2$
- $V_1 + V_2 > V_3$
- $V_1 + V_2 = V_3$
The Correct Option is D
Solution and Explanation
Applying Kirchhoff’s Voltage Law (KVL) across the loop: \(V_1 + V_2 - V_3 = 0 \implies V_1 + V_2 = V_3.\)
The Correct answer is: $V_1 + V_2 = V_3$
Top Questions on Electrical Instruments
- Which of the following resistivity (\(\rho\)) vs temperature (T) curves is most suitable to be used in wire-bound standard resistors?
- JEE Main - 2025
- Physics
- Electrical Instruments
- Four identical cells, each with internal resistance 1 \(\Omega\) and emf 10 V are connected in series to a resistance R and they are connected in parallel and then to an external resistance R in series. For what value of R the current in series and in parallel combination is the same?
- AP EAMCET - 2024
- Physics
- Electrical Instruments
The Wheatstone bridge is balanced when \(R_3 = 144 \, \Omega\). If \(R_2\) and \(R_1\) are interchanged, the bridge balances for \(R_3 = 169 \, \Omega\). The value of \(R_4\) is:
- AP EAMCET - 2024
- Physics
- Electrical Instruments
- A coil of 200 turns and area of cross-section \(5 \times 10^{-3} \, m^2\) carries a current of 3 A. - The magnetic moment of the coil is
- TS EAMCET - 2024
- Physics
- Electrical Instruments
- In Geiger-Marsden experiment, if the initial speed of \(\alpha\) particle is doubled, then the closest distance of approach of the \(\alpha\) particle from the gold nucleus - (Assume \(\alpha\) particle is projected straight towards the gold nucleus)
- TS EAMCET - 2024
- Physics
- Electrical Instruments
Questions Asked in JEE Main exam
- In YDSE, light of intensity \( 4I \) and \( 9I \) passes through two slits respectively. Difference of maximum and minimum intensity of interference pattern is:
- JEE Main - 2025
- Wave optics
Let \( y = f(x) \) be the solution of the differential equation
\[ \frac{dy}{dx} + 3y \tan^2 x + 3y = \sec^2 x \]
such that \( f(0) = \frac{e^3}{3} + 1 \), then \( f\left( \frac{\pi}{4} \right) \) is equal to:
- JEE Main - 2025
- Differential Equations
Find the IUPAC name of the compound.
- JEE Main - 2025
- Aromaticity & chemistry of aromatic compounds
If \( \lim_{x \to 0} \left( \frac{\tan x}{x} \right)^{\frac{1}{x^2}} = p \), then \( 96 \ln p \) is: 32
- JEE Main - 2025
- Limits and Exponential Functions
- The integral \[ \int_0^\pi \frac{8x}{4\cos^2 x + \sin^2 x} \, dx \text{ is equal to:} \]
- JEE Main - 2025
- Trigonometric Functions