When the current $i$ is flowing through a conductor, the drift velocity is $v$. If $2i$ current is flowed through the same metal but having double the area of cross-section, then the drift velocity will be
  • A$v/4$
  • B$v/2$
  • C$v$
  • D$4\,v$
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
    Assertion : A current continues to flow in superconducting coil even after switch is off.

    Reason : Superconducting coils show Meissner effect

    View Solution
  • 2
    A cell of internal resistance $r$ drives current through an external resistance $R$ . The power delivered by the cell to the external resistance will be maximum when:
    View Solution
  • 3
    The potential drop across the $3$ $\Omega$ resistor is ............... $V$
    View Solution
  • 4
    The figure here shows a portion of a circuit. What are the magnitude and direction of the current i in the lower right-hand wire .................... $A$
    View Solution
  • 5
    In the circuit shown in figure, find the current through the branch $BD$ ............. $A$
    View Solution
  • 6
    A heater of $220\, V$ heats a volume of water in $5\,\min$ time. A heater of $110\, V$ heats the same volume of water in ............... $min$
    View Solution
  • 7
    The figure shows a network of currents. The magnitude of currents is shown here. The current $I$ will be ........... $A$
    View Solution
  • 8
    A wire of diameter $0.02\,meter$ contains $10^{28}$ free electrons per cubic meter. For an electrical current of $100\, A$, the drift velocity of the free electrons in the wire is nearly
    View Solution
  • 9
    Two cells of emf $E_1$ and $E_2\left(E_1 > E_2\right)$ are connected individually to a potentiometer and their corresponding balancing length are $625 \,cm$ and $500 \,cm$, then the ratio $\frac{E_1}{E_2}$ is ...........
    View Solution
  • 10
    Electric room radiator which operates at $225\, volts$ has resistance of $50\, ohms$. Power of the radiator is approximately ............... $W$
    View Solution