JEE Mains · Physics · STD 12 - 3. current electricity
In a meter bridge experiment the balance point in obtained if the gaps are closed by \(2\,\Omega\) and \(3\,\Omega\). A shunt of \(x\,\Omega\) is added to \(3\,\Omega\) resistor to shift the balancing point by \(22.5\,cm\). The value of \(X\) is \(................\)
- A \(2\)
- B \(4\)
- C \(6\)
- D \(8\)
Answer & Solution
Correct Answer
(A) \(2\)
Step-by-step Solution
Detailed explanation
\(\frac{2}{\left(\frac{3 x}{3+x}\right)}=\frac{40+22.5}{60-22.5}=\frac{62.5}{37.5}=\frac{5}{3}\) \(\frac{6}{5}=\frac{3 x}{3+x}\) \(6+2 x=5 x \Rightarrow x=2\)
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
- White light is passed through a double slit and interference is observed on a screen \(1.5 \,{m}\) away. The separation between the slits is \(0.3 \,{mm}\). The first violet and red fringes are formed \(2.0 \,{mm}\) and \(3.5\, {mm}\) away from the central white fringes. The difference in wavelengths of red and voilet light is \(.... \,{nm} .\)JEE Mains 2021 Hard
- A convex lens made of glass (refractive index \(=1.5\) ) has focal length 24 cm in air. When it is totally immersed in water (refractive index \(=1.33\) ), its focal length changes to ________.JEE Mains 2025 Medium
- The entropy of any system is given by \({S}=\alpha^{2} \beta \ln \left[\frac{\mu {kR}}{J \beta^{2}}+3\right]\) Where \(\alpha\) and \(\beta\) are the constants. \(\mu, J, K\) and \(R\) are no. of moles, mechanical equivalent of heat, Boltzmann constant and gas constant repectively. [Take \({S}=\frac{{dQ}}{{T}}\) ] Choose the incorrect option from the following:JEE Mains 2021 Hard
- An \(LCR\) series circuit of capacitance \(62.5\,nF\) and resistance of \(50\,\Omega\). is connected to an \(A.C.\) source of frequency \(2.0\,kHz\). For maximum value of amplitude of current in circuit, the value of inductance is \(..........mH\). (take \(\left.\pi^2=10\right)\)JEE Mains 2023 Easy
- The dimensional formula of \(\dfrac{1}{2}\epsilon_0 E^2\) (\(\epsilon_0\) = permittivity of vacuum and \(E\) = electric field) is \(M^a L^b T^c\). The value of \(2a - b + c = \) _______.JEE Mains 2026 Medium
- A body of mass \(m\) is projected with velocity \(\lambda v_{e}\) in vertically upward direction from the surface of the earth into space. It is given that \(v _{ e }\) is escape velocity and \(\lambda<1\). If air resistance is considered to the negligible, then the maximum height from the centre of earth, to which the body can go, will be. ( \(R\) : radius of earth)JEE Mains 2022 Hard
More PYQs from JEE Mains
- The integral \(\int {\frac{{3{x^{13}}\, + \,\,2{x^{11}}}}{{{{(2{x^4}\, + \,3{x^2}\, + \,1)}^4}}}dx} \) is equal to (where \(C\) is a constant of integration)JEE Mains 2019 Hard
- If the area bounded by the curve \(2 y^2=3 x\), lines \(x+y=3, y=0\) and outside the circle \((x-3)^2+y^2=2\) is \(A\), then \(4(\pi+4 A )\) is equal to \(.........\).
JEE Mains 2023 Hard - A pendulum is suspended by a string of length \(250\,cm\). The mass of the bob of the pendulum is \(200\,g\). The bob is pulled aside until the string is at \(60^{\circ}\) with vertical as shown in the figure. After releasing the bob. the maximum velocity attained by the bob will be________ \(ms ^{-1}\). (if \(g=10\,m / s ^{2}\) )
JEE Mains 2022 Medium - A \(16\, \Omega\) wire is bend to form a square loop. A \(9 \,{V}\) supply having internal resistance of \(1 \,\Omega\) is connected across one of its sides. The potential drop across the diagonals of the square loop is \(.......\,\times 10^{-1} \,{V}\)JEE Mains 2021 Medium
- If \(x = \int\limits_0^y {\frac{{dt}}{{\sqrt {1 + {t^2}} }}} \), then \(\frac{{{d^2}y}}{{d{x^2}}}\) is equal toJEE Mains 2013 Hard
- Let \(\hat{u}\) and \(\hat{v}\) be unit vectors inclined at an acute angle such that \(|\hat{u}\times\hat{v}|=\dfrac{\sqrt{3}}{2}\). If \(\vec{A}=\lambda\hat{u}+\hat{v}+(\hat{u}\times\hat{v})\), then \(\lambda\) is equal to:JEE Mains 2026 Hard