The resistivity of a wire
  • A
    Increases with the length of the wire
  • B
    Decreases with the area of cross-section
  • C
    Decreases with the length and increases with the cross-section of wire
  • D
    None of the above statement is correct
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
    When a piece of aluminium wire of finite length is drawn through a series of dies to reduce its diameter to half its original value, its resistance will become ........ times
    View Solution
  • 2
    What is the equivalent resistance between the points $A$ and $B$ of the network ..................  $\Omega$
    View Solution
  • 3
    A current of $2\,A$ flows through a wire of crosssectional area $25.0\,mm ^2$. The number of free electrons in a cubic meter are $2.0 \times 10^{28}$. The drift velocity of the electrons is $...............\times 10^{-6}\,ms ^{-1}$ (given, charge on electron $=1.6 \times 10^{-19}\,C$ )
    View Solution
  • 4
    Consider the ladder network shown in figure. What should be the value of resistance $R$, so that effective resistance between $A$ and $B$ becomes independent of number of elements in the combination is ............. $\Omega$
    View Solution
  • 5
    In a potentiometer arrangement, a cell of $emf$ $1.25\; V$ gives a balance point at $35.0\; cm$ length of the wire. If the cell is replaced by another cell and the balance point shifts to $63.0\; cm ,$ what is the $emf$ of the second cell in $V$?
    View Solution
  • 6
    In circuit shown below, the resistances are given in $ohms$ and the battery is assumed ideal with emf equal to $3\, volt$. The voltage across the resistance $R_4$ is ................. $V$
    View Solution
  • 7
    Two conductors have the same resistances at $0^{\circ} \mathrm{C}$ but their temperature coefficients of resistance are $\alpha_1$ and $\alpha_2$. The respective temperature coefficients for their series and parallel combinations are :
    View Solution
  • 8
    A $5\,^oC$ rise in temperature is observed in a conductor by passing a current. When the current is doubled the rise in temperature will be approximately ........... $^oC$
    View Solution
  • 9
    Calculate the equivalent resistance between $A$ and $B$
    View Solution
  • 10
    In the circuit, the potential difference across $PQ$ will be nearest to .............. $V$
    View Solution