AP EAMCET · PHYSICS · Current Electricity
The sensitivity of a galvanometer that measures current is decreased by \(\frac{1}{40}\) times by using shunt resistance of \(10 \Omega\). Then, the value of the resistance of the galvanometer is
- A \(400 \Omega\)
- B \(410 \Omega\)
- C \(30 \Omega\)
- D \(390 \Omega\)
Answer & Solution
Correct Answer
(D) \(390 \Omega\)
Step-by-step Solution
Detailed explanation
\(\begin{aligned} i_g & =\frac{S}{S+G} i \\ \frac{1}{40} & =\frac{10}{10+x} \\ \Rightarrow \quad 10+x & =400 \\ \Rightarrow \quad x & =390 \Omega\end{aligned}\)
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from PHYSICS
- Which of the following is the property of Rydberg constant?AP EAMCET 2021 Easy
- The ratio energies of emitted radiation by a black body at \(600 \mathrm{~K}\) and \(933 \mathrm{~K}\) when the surrounding temperature is \(300 \mathrm{~K}\)AP EAMCET 2015 Easy
- The frequency of a light ray is \(6 \times 10^{14} \mathrm{~Hz}\). Its frequency when it propagates in a medium of refractive index 1.5, will beAP EAMCET 2023 Easy
- Dispersive power depends on the following :AP EAMCET 2006 Easy
- If the radius of a nucleus with mass number 125 is 1.5 fermi, then radius of a nucleus with mass number 64 isAP EAMCET 2014 Easy
- A conveyor belt is moving horizontally with a velocity of \(2 \mathrm{~m} \mathrm{~s}^{-1}\). If a body of mass 10 kg is kept on it, then the distance travelled by the body before coming to rest is
(The coefficient of kinetic friction between the belt and the body is 0.2 and acceleration due to gravity is \(10 \mathrm{~m} \mathrm{~s}^{-2}\) )AP EAMCET 2025 Medium
More PYQs from AP EAMCET
- If \(\alpha, \beta\) and \(\gamma\) are the roots of the equation \(x^3+3 x^2-7 x+5=0\), then the value of \(\frac{1}{\alpha}+\frac{1}{\beta}+\frac{1}{\gamma}\) isAP EAMCET 2021 Easy
- If \(\alpha, \beta\) and \(\gamma\) are the roots of the equation \(2 x^3+3 x^2-5 x-7=0\), then \(\frac{1}{\alpha^2}+\frac{1}{\beta^2}+\frac{1}{\gamma^2}=\)AP EAMCET 2025 Medium
- At , saturated solution of was found to have a specific conductivity of and that of water being used is . If the ionic conductance's of and are and respectively, the solubility of at will be [Atomic masses ofAP EAMCET 2021 Medium
- The angle between the lines whose direction cosines are given by the equations \(l^2+m^2-n^2=0\) and \(l+m+n=0\) isAP EAMCET 2021 Medium
- A man is known to speak truth 7 out of 10 times. After throwing a die with 100 faces marked 1,2,3,.., 100 on it's faces, the man reports that he got a prime number on the die. What is the probability that it is actually a prime?AP EAMCET 2021 Medium
- If \(f(2)=4\) and \(f^{\prime}(2)=1\), then
\[
\lim _{x \rightarrow 2} \frac{x f(2)-2 f(x)}{x-2}
\]
is equal toAP EAMCET 2008 Medium