The length of a wire of a potentiometer is \( 100 \mathrm{~cm} \), and the emf of its stand and ...

Channel:
PW Solutions
Subscribers:
453,000
Published on ● Video Link: https://www.youtube.com/watch?v=q-YuyObcqxE


Duration: 3:29
1 views
0

The length of a wire of a potentiometer is \( 100 \mathrm{~cm} \), and the emf of its stand and cell is \( E \) volt. It is employed to measure the emf of a battery whose internal resistance is \( 0.5 \Omega \). If the balance point is obtained at \( l=30 \mathrm{~cm} \) from the positive end, the emf of the battery is
(A) \( \frac{30 E}{100.5} \)
(B) \( \frac{30 E}{100-0.5} \)
(C) \( \frac{30(E-0.5 i)}{100} \), where \( i \) is the current in the potentiometer wire
(D) \( \frac{30 E}{100} \)
📲PW App Link - https://bit.ly/YTAI_PWAP
🌐PW Website - https://www.pw.live



Other Videos By PW Solutions


2022-11-17The only possibility of the heat flow in a thermos flask is through its cork which is \( 75 \mat...
2022-11-17The number of spheres of radius \( r \) touching the coordinate axes is
2022-11-17Two wires of equal diameters, of resistivities \( \rho_{1} \) and \( \rho_{2} \) and lengths \( ...
2022-11-17If \( y=\sqrt{x}+\frac{1}{\sqrt{x}} \), show that \( 2 x \frac{d y}{d x}+y=2 \sqrt{x} \).
2022-11-17यदि \( \triangle \mathrm{ABC} \) में \( \angle \mathrm{C}=2 \angle \mathrm{B}=\angle \mathrm{A}+...
2022-11-17Many elements are found in living organisms either free or in the form of compounds. One of the ...
2022-11-17Evaluate \[ \mathrm{P}(6,4) \]
2022-11-17Light of frequency \( 8 \times 10^{15} \mathrm{~Hz} \) is incident on a substance of photoelectr...
2022-11-17डार्विन की सबसे बड़ी कमी थी : (A) जीवन संघर्ष की व्याख्या न होना (B) योग्यतम की उत्तरजीविता की व...
2022-11-17A car of mass \( 1000 \mathrm{~kg} \) accelerates uniformly from rest to a velocity of \( 54 \ma...
2022-11-17The length of a wire of a potentiometer is \( 100 \mathrm{~cm} \), and the emf of its stand and ...
2022-11-17\( \int \frac{\sin x}{\sqrt{1+\cos x}} d x \) का मान है- (A) \( -\sqrt{1+\cos x}+c \) (B) \( \sq...
2022-11-17What happens when Sodium sulphate solution is added to an aqueous solution of barium nitrate.
2022-11-17A boy on a skate board skates off a horizontal bench at a velocity of \( 10 \mathrm{~m} / \mathr...
2022-11-17यदि \( \mathrm{A}=\left[\begin{array}{ccc}\frac{2}{3} & 1 & \frac{5}{3} \\ \frac{1}{3} & \frac{2...
2022-11-17Calculate the Coulomb force between two alpha particles separated by a distance of \( 3.2 \times...
2022-11-17Calculate the Van der Waals constants for carbon dioxide if its critical temperature \( T_{c r}=...
2022-11-17Match the following in Drosophila with reference to sex determination: (A) \( A=3, B=5, C=1, D=2...
2022-11-17The taxonomic category below the level of family is (A) Class (B) Order (C) Phylum (D) Genus
2022-11-17Give the structure of a nematoblast cell of Hydra, as revealed by electron microscope. Add a not...
2022-11-17One mole of a certain ideal gas is contained under a weightless piston of a vertical cylinder at...