Download App
We are able to obtain fairly large currents in a conductor because
  • A
    The electron drift speed is usually very large
  • B
    The number density of free electrons is very high and this can compensate for the low values of the electron drift speed and the very small magnitude of the electron charge
  • C
    The number density of free electrons as well as the electron drift speeds are very large and these compensate for the very small magnitude of the electron charge
  • D
    The very small magnitude of the electron charge has to be divided by the still smaller product of the number density and drift speed to get the electric current
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.*
Download App

Similar Questions

  • 1
    In the circuit, given in the figure currents in different branches and value of one resistor are shown. Then potential at point $B$ with respect to the point $A$ is$.......V$
    View Solution
  • 2
    You are given a resistance wire of length $50\, cm$ and a battery of negligible resistance. In which of the following cases is largest amount of heat generated
    View Solution
  • 3
    In the figure shown, the total resistance between $A$ and $B$ is ............. $\Omega$
    View Solution
  • 4
    Water boils in an electric kettle in $15\,\min$ after switching on. If the length of the heating wire is decreased to $2/3$ of its initial value, then the same amount of water will boil with the same supply voltage in ............. $min$
    View Solution
  • 5
    The equivalent resistance of the given circuit between the terminals ${A}$ and ${B}$ is  $....\Omega$
    View Solution
  • 6
    In the circuit, the potential difference across $PQ$ will be nearest to .............. $V$
    View Solution
  • 7
    The potential difference between $A$ and $B$ in the Figure is ................... $\mathrm{V}$
    View Solution
  • 8
    Assertion : Kirchoff 's junction rule follows from conservation of charge.

    Reason : Kirchoff 's loop rule follows from conservation of momentum.

    View Solution
  • 9
    A $6.0\,volt$ battery is connected to two light bulbs as shown in figure. Light bulb $1$ has resistance $3\,ohm$ while light bulb $2$ has resistance $6\,ohm.$ Battery has negligible internal resistance. Which bulb will glow brighter?
    View Solution
  • 10
    You are given three bulbs of $25$, $40$ and $60\, watt$. Which of them has lowest resistance
    View Solution