MHT CET · Physics · Current Electricity
In potentiometer experiment, cells of e.m.f. ' \(E_1\) ' and ' \(E_2\) ' are connected in series \(\left(E_1>E_2\right)\) the balancing length is \(64 \mathrm{~cm}\) of the wire. If the polarity of \(\mathrm{E}_2\) is reversed, the balancing length becomes \(32 \mathrm{~cm}\). The ratio \(\frac{E_1}{E_2}\) is
- A \(1: 1\)
- B \(6: 1\)
- C \(3: 1\)
- D \(2: 1\)
Answer & Solution
Correct Answer
(C) \(3: 1\)
Step-by-step Solution
Detailed explanation
\(\frac{E_1}{E_2}=\frac{\ell_1+\ell_2}{\ell_1-\ell_2}=\frac{64+32}{64-32}=\frac{96}{32}=3\)
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
- A charge Q is enclosed by a Gaussian surface of radius \(R\). If the radius is doubled then the outward electric flux willMHT CET 2022 Easy
- In an n-p-n transistor, the collector current is \(28 \mathrm{~mA}\). If \(80 \%\) of electrons reach the collector, its base current in \(\mathrm{mA}\) isMHT CET 2023 Medium
- A vehicle runs on a straight road of length ' L '. It travels half the distance with speed V and the remaining distance with speed \(\frac{\mathrm{V}}{3}\). Its average speed isMHT CET 2024 Medium
- A string is vibrating in its fifth overtone between two rigid supports 2.4 apart. The distance between successive node and antinode isMHT CET 2018 Easy
- Water rises up to a height \(h\) in a capillary tube immersed vertically in water. When this whole arrangement is taken to a depth \(d\) in a mine, the water level rises up to a height \(h^{\prime}\). If \(R\) is the radius of the earth, then the ratio \(\frac{h}{h^{\prime}}\) isMHT CET 2022 Hard
- The Boolean expression for 'XOR' gate \(C=(A \oplus B)\) is equal toMHT CET 2024 Easy
More PYQs from MHT CET
- Equation of the plane passing through the point \((1,2,3)\) and parallel to the plane \(2 x+3 y-4 z=0\)MHT CET 2021 Easy
- The molar conductivities at infinite dilution for sodium acetate, HCI and NaCI are 91 S and respectively. The molar conductivity of acetic acid at infinite dilution isMHT CET 2019 Hard
- A bus is moving with a velocity of \(5 \mathrm{~m} / \mathrm{s}\) towards a wall. The driver blows the horn of frequency \(165 \mathrm{~Hz}\). If the speed of sound in air is \(335 \mathrm{~m} / \mathrm{s}\), then after reflection of sound wave, the number of beats per second heard by the passengers in the bus will beMHT CET 2020 Medium
- The general solution of the differential equation.
\(
\left(\frac{y}{x}\right) \cos \left(\frac{y}{x}\right) d x-\left[\left(\frac{x}{y}\right) \sin \left(\frac{y}{x}\right)+\cos \left(\frac{y}{x}\right)\right] d y=0 \text { is }
\)MHT CET 2021 Hard - A particle of mass ' \(m\) ' is performing uniform circular motion along a circular path of radius ' \(r\) '. Its angular momentum about the axis passing through the centre and perpendicular to the plane is ' \(L\) '. The kinetic energy of the particle isMHT CET 2024 Easy
- The angle between the lines \(\frac{x-1}{4}=\frac{y-3}{1}=\frac{z}{8}\) and \(\frac{x-2}{2}=\frac{y+1}{2}=\frac{z-4}{1}\) isMHT CET 2020 Easy