Ohm's law fails in
Easy
Download our app for free and get startedPlay store
(d)

Ohm's law is not applicable for diode, thyristor as well as $PN$ junction

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
    A heating element has a resistance of  $100\,\Omega $ at room temperature. When it is connected to a supply of  $220\,V,$  a steady current of $2\,A$  passes in it and temperature is $500\,^oC$ more than room temperature. What is the temperature coefficient resistance of the heating element?
    View Solution
  • 2
    A resistance wire connected in the left gap of a meter bridge balances a $10\, \Omega$ resistance in the right gap at a point which divides the bridge wire in the ratio $3: 2 .$ If the length of the resistance wire is $1.5 m ,$ then the length of $1\, \Omega$ of the resistance wire is $....... \times 10^{-2}\;m$
    View Solution
  • 3
    The potential difference across the $100\,\Omega$ resistance in the following circuit is measured by a voltmeter of $900 \,\Omega$ resistance. The percentage error made in reading the potential difference is
    View Solution
  • 4
    In a circuit shown in the figure, the capacitor $C$ is initially uncharged and the key $K$ is open. In this condition, a current of $1 \mathrm{~A}$ flows through the $1 \Omega$ resistor. The key is closed at time $t=t_0$. Which of the following statement($s$) is(are) correct?

    [Given: $\mathrm{e}^{-1}=0.36$ ]

    ($A$) The value of the resistance $R$ is $3 \Omega$.

    ($B$) For $t$

    ($C$) At $t=t_0+7.2 \mu \mathrm{s}$, the current in the capacitor is $0.6 \mathrm{~A}$.

    ($D$) For $t \rightarrow \infty$, the charge on the capacitor is $12 \mu C$.

    View Solution
  • 5
    A capacitor is connected to a cell of $emf$ $E$ having some internal resistance $r$. The potential difference across the
    View Solution
  • 6
    Two bulbs of $100\, W$ and $200\, W$ working at $220$ $volt$ are joined in series with $220$ $volt$ supply. Total power consumed will be approximately ........... $watt$
    View Solution
  • 7
    A Daniel cell is balanced on $125\,cm$ length of a potentiometer wire. Now the cell is short-circuited by a resistance $2\, ohm$ and the balance is obtained at $100\,cm$. The internal resistance of the Daniel cell is .............. $ohm$
    View Solution
  • 8
    The figure shows a tetrahedron, each side of which has a resistance $r$ Choose the correct diagram $(s),$ which show two-dimensional equivalent of the tetrahedron.
    View Solution
  • 9
    A null point is found at $200\,cm$ in potentiometer when cell in secondary circuit is shunted by $5\,\Omega$. When a resistance of $15\,\Omega$ is used for shunting null point moves to $300\,cm$. The internal resistance of the cell is $..............\,\Omega$.
    View Solution
  • 10
    In the figure shown, if the internal resistance of the battery is $1\, ohm$ , the reading of the ammeter will be ................. $\mathrm{A}$
    View Solution