Question:
An ammeter has resistance \(R\) and range \(I\). What resistance should be connected in parallel with it to increase its range by \(nI\)?
An ammeter has resistance \(R\) and range \(I\). What resistance should be connected in parallel with it to increase its range by \(nI\)?
Show Hint
The ammeter and shunt are in parallel, so they have equal potential difference. The shunt carries the extra current nI.
Updated On: Nov 12, 2026
- \(\frac{R}{(n-1)}\)
- \(\frac{R}{(n+1)}\)
- \(\frac{R}{n}\)
- \(Rn\)
Show Solution
Verified By Collegedunia
The Correct Option is C
Solution and Explanation
Step 1: Understanding the Concept
A shunt is connected in parallel so that the extra current bypasses the ammeter.
Step 2: Currents
The ammeter carries its full range \(I\) and the shunt carries the extra current \(nI\).
Step 3: Equal Potential Difference
\(IR=(nI)S\).
Step 4: Solve
\(S=\dfrac{R}{n}\).
Final Answer:
The required shunt resistance is R over n. \[ \boxed{\text{(C) }\dfrac{R}{n}} \]
A shunt is connected in parallel so that the extra current bypasses the ammeter.
Step 2: Currents
The ammeter carries its full range \(I\) and the shunt carries the extra current \(nI\).
Step 3: Equal Potential Difference
\(IR=(nI)S\).
Step 4: Solve
\(S=\dfrac{R}{n}\).
Final Answer:
The required shunt resistance is R over n. \[ \boxed{\text{(C) }\dfrac{R}{n}} \]
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 The Moving Coil Galvanometer Questions
A stray magnetic field does \(\textbf{NOT}\) affect the deflection of a moving coil galvanometer because
- If number of turns in moving coil galvanometer becomes half, then the deflection for the same current will become:
- Electric field intensity at a point outside uniformly charged thin infinite plane sheet is \(E_1\). The electric field intensity at a point near and outside the surface of a positively charged conductor of any shape is \(E_2\). The relation between magnitude of \(E_1\) and \(E_2\) is (assume air as the medium)
- A water film is formed between two straight parallel wires, each of length \(10\,\text{cm}\), kept at a separation of \(0.5\,\text{cm}\). Now, the separation between them is increased by \(1\,\text{mm}\) without breaking the water film. The work done for this is (surface tension of water \(= 7.2 \times 10^{-2}\,\text{N m}^{-1}\))
- A galvanometer of resistance 50 $\Omega$ is converted to an ammeter. After shunting, the effective resistance of ammeter is 2.5 $\Omega$. The value of shunt is
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