Question:
The voltmeter has range $10\text{ V}$ and its internal resistance is $50\Omega$. To increase the range of voltmeter to $15\text{ V}$ , the resistance which is to be connected is
The voltmeter has range $10\text{ V}$ and its internal resistance is $50\Omega$. To increase the range of voltmeter to $15\text{ V}$ , the resistance which is to be connected is
Show Hint
To increase voltmeter range, add resistance in series.
To increase ammeter range, add resistance in parallel.
Updated On: May 14, 2026
- $125\Omega$ resistance in parallel
- $125\Omega$ resistance in series
- $25\Omega$ resistance in parallel
- $25\Omega$ resistance in series
Show Solution
Verified By Collegedunia
The Correct Option is D
Solution and Explanation
Concept:
To increase the range of a voltmeter, a high resistance is connected in series. ip
Step 1: Find full-scale current of the voltmeter.
Given original range: \[ V=10\text{ V}, \qquad R=50\Omega \] So full-scale current is: \[ I=\frac{V}{R}=\frac{10}{50}=0.2\text{ A} \] ip
Step 2: Find required total resistance for 15 V range.
For the same full-scale current: \[ R_{\text{total}}=\frac{15}{0.2}=75\Omega \] ip
Step 3: Find extra resistance to be connected.
\[ R_{\text{extra}}=75-50=25\Omega \] This resistance must be connected in series. ip Hence, the correct answer is:
\[ \boxed{(D)\ 25\Omega \text{ in series}} \]
To increase the range of a voltmeter, a high resistance is connected in series. ip
Step 1: Find full-scale current of the voltmeter.
Given original range: \[ V=10\text{ V}, \qquad R=50\Omega \] So full-scale current is: \[ I=\frac{V}{R}=\frac{10}{50}=0.2\text{ A} \] ip
Step 2: Find required total resistance for 15 V range.
For the same full-scale current: \[ R_{\text{total}}=\frac{15}{0.2}=75\Omega \] ip
Step 3: Find extra resistance to be connected.
\[ R_{\text{extra}}=75-50=25\Omega \] This resistance must be connected in series. ip Hence, the correct answer is:
\[ \boxed{(D)\ 25\Omega \text{ in series}} \]
Was this answer helpful?
0
0
Top MHT CET Physics Questions
- In non uniform circular motion, the ratio of tangential to radial acceleration is (r = radius of circle, $v =$ speed of the particle, $\alpha =$ angular acceleration)
- A particle moves along a circle of radius ?$r$? with constant tangential acceleration. If the velocity of the particle is ?$?$? at the end of second revolution, after the revolution has started then the tangential acceleration is
- If $M_z$ = magnetization of a paramagnetic sample, $B$ = external magnetic field, $T$ = absolute temperature, $C$ = curie constant then according to Curie�s law in magnetism, the correct relation is
- In a fundamental mode, the time required for the sound wave to reach upto the closed end of a pipe filled with air is $'t'$ second. The frequency of vibration of air column is
- In a parallel plate capacitor, the capacity increases if
View More Questions
Top MHT CET Electrical Instruments Questions
- A galvanometer of resistance $ 50\,\Omega $ is connected to a battery of $ 3 \,V $ along with a resistance of $ 2950\,\Omega $ in series. A full scale deflection of $ 30 $ divisions is obtained in the galvanometer. In order to reduce this deflection to $ 20 $ divisions, the resistance in series should be
- When the temperature exceeds the transition temperature, a ferromagnetic material becomes similar to:
- A galvanometer has resistance \( G = 100 \, \Omega \) and shows full-scale deflection at \( I_q = 1 \, \text{mA} \). To convert it into a voltmeter of range 5 V, what resistance should be connected in series?
- A galvanometer of resistance ' \(G\) ' can be converted into a voltmeter of range \( (0 - V) \) volt by connecting a resistance ' \(R\) ' in series with it. The resistance ' \(R\) ' required to change its range from \( \left(0 - \frac{V}{4}\right) \) volt will be
- A galvanometer of resistance ' \(G\) ' can be converted into a voltmeter of range \( (0 - V) \) volt by connecting a resistance ' \(R\) ' in series with it. The resistance ' \(R\) ' required to change its range from \( \left(0 - \frac{V}{4}\right) \) volt will be
View More Questions
Top MHT CET Questions
- During r- DNA technology, which one of the following enzymes is used for cleaving DNA molecule ?
- In non uniform circular motion, the ratio of tangential to radial acceleration is (r = radius of circle, $v =$ speed of the particle, $\alpha =$ angular acceleration)
- The temperature of $32^{\circ}C$ is equivalent to
- The line $5x + y - 1 = 0$ coincides with one of the lines given by $5x^2 + xy - kx - 2y + 2 = 0 $ then the value of k is
- The heat of formation of water is $ 260\, kJ $ . How much $ H_2O $ is decomposed by $ 130\, kJ $ of heat ?
View More Questions