Calculate the net resistance of the circuit between $A$ and $B$
AIPMT 2000, Medium
Download our app for free and get startedPlay store
(a) The given circuit is a balanced Wheatstone bridge, hence it can be redrawn as follows
$ \Rightarrow \,\,\,\,\,\,{R_{eq}} = \frac{{7 \times 14}}{{(7 + 14)}} = \frac{{14}}{3}\Omega $.
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
    Determine the charge on the capacitor in the following circuit ................ $\mu  C$
    View Solution
  • 2
    An electric bulb rated as $200\, {W}$ at $100 \,{V}$ is used in a circuit having $200\, {V}$ supply. The resistance $'R'$ that must be put in series with the bulb so that the bulb delivers the same power is $.....\,\Omega$
    View Solution
  • 3
    A cylindrical resistance is connected across battery $\varepsilon $ . Cylinder has uniform free electron density, mid part of cylinder has larger radius as shown in figure. Then $V_d$  (drift velocity) $V/S$ (distance across the length of the resistance)
    View Solution
  • 4
    An electric current flows along an insulated strip $PQ$ of a metallic conductor. The current density in the strip varies as shown in graph of figure. Which one of the following statements could explain this variation ?
     
    View Solution
  • 5
    If a wire of resistance $20\,\Omega $ is covered with ice and a voltage of $210\, V$ is applied across the wire, then the rate of melting of ice is .................. $g/s$
    View Solution
  • 6
    Which is a wrong statement
    View Solution
  • 7
    At room temperature $\left(27^{\circ} \mathrm{C}\right)$, the resistance of a heating element is $50 \Omega$. The temperature coefficient of the material is $2.4 \times 10^{-4}{ }^{\circ} \mathrm{C}^1$. The temperature of the element, when its resistance is $62 \Omega$, is $\qquad$ ${ }^{\circ} \mathrm{C}$.
    View Solution
  • 8
    In the potentiometer circuit as shown in the figure, the balance length $Al = 60\ cm$ when switch $S$ is open. When switch $S$ is closed and the value of $R$ is $5W$ the balance length $Al' = 50 cm.$ The internal resistance of the cell $C'$ is : .............. $\Omega$
    View Solution
  • 9
    The voltage drop across $15\, \Omega$ resistance in the given figure will be $.....V.$
    View Solution
  • 10
    If an observer is moving with respect to a stationary electron, then he observes
    View Solution