In potentiometer a balance point is obtained, when
  • AThe $e.m.f.$ of the battery becomes equal to the $e.m.f.$ of the experimental cell
  • BThe $p.d.$ of the wire between the $+ve$ end to jockey becomes equal to the $e.m.f.$ of the experimental cell
  • CThe $p.d.$ of the wire between $+ve$ point and jockey becomes equal to the $e.m.f.$ of the battery
  • DThe $p.d.$ across the potentiometer wire becomes equal to the $e.m.f.$ of the battery
Easy
art

Download our app
and get started for free

Experience the future of education. Simply download our apps or reach out to us for more information. Let's shape the future of learning together!No signup needed.*

Similar Questions

  • 1
    The capacitor shown in fig. is in steady state. The energy stored in the capacitor is
    View Solution
  • 2
    $A$ potentiometer wire has length $10\, m$ and resistance $10\,\Omega$ . It is connected to a battery of $EMF$ $11\, volt$ and internal resistance $1\, \Omega$ , then the potential gradient in the wire is ............... $V/m$
    View Solution
  • 3
    To find the resistance of a galvanometer by the half deflection method the following circuit is used with resistances $R_1 = 9970\,\Omega,$ $R_2 = 30\,\Omega$ and $R_3 = 0\,\Omega.$ The deflection in the galvanometer is $d$. With $R_3 = 107\,\Omega$ the deflection changed to $\frac {d}{2}$The galvanometer resistance is approximately ............... $\Omega$
    View Solution
  • 4
    A current of $2\,A$ flows through a $2\,\Omega$ resistor when connected across a battery. The same battery supplies a current of $0.5\,\, A$ when connected across a $9 \,\,\Omega$ resistor. The internal resistance of the battery is 
    View Solution
  • 5
    A wire $50\, cm$  long and $1\;mm^2$ in cross -section carries a current of $4\; A$ when connected to a $2\; V$ battery. The resistivity of the wire is
    View Solution
  • 6
    An unknown resistance $R_1$ is connected in series with a resistance of $10  \,\Omega$. This combinations is connected to one gap of a meter bridge while a resistance $R_2$ is connected in the other gap. The balance point is at $50\, cm$. Now, when the $10  \,\Omega$ resistance is removed the balance point shifts to $40\, cm$. The value of $R_1$ is (in $ohm$)
    View Solution
  • 7
    Carbon resistor has resistance specified by three bands having colour red, yellow and black. If this resistor is cut into two pieces of equal length then the new colour code of each one will be (Neglect tolerance of $4^{th}$ band)
    View Solution
  • 8
    $62.5 \times {10^{18}}$ electrons per second are flowing through a wire of area of cross-section $0.1\,{m^2}$, the value of current flowing will be ............ $A$
    View Solution
  • 9
    A certain piece of silver of given mass is to be made like a wire. Which of the following combination of length $(L)$ and the area of cross-sectional $(A) $ will lead to the smallest resistance
    View Solution
  • 10
    A wire of radius $r$ has resistance $R$. If it is stretched to a radius of $\frac{{3r}}{4}$, its resistance becomes
    View Solution